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acid-test.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Browser transform MathML tests</title>
<meta charset="utf-8" />
<link rel="stylesheet" type="text/css" href="./menclose/menclose.css">
<script type="module">
import { _MathTransforms } from './all-polyfills.js'
document.head.appendChild ( _MathTransforms.getCSSStyleSheet() );
window.transform = function (elementId) {
_MathTransforms.transform(elementId);
}
function htmlContents(toc) {
//toc of contents - remove # if necessary
let TOC = document.getElementById(toc.replace(/\#/g, ''))
let headers = document.querySelectorAll('h2');
//keep track of ids
let ids = []
headers.forEach(function (el) {
// if it has an id already, just add that to the array
if (el.id) return ids.push(el.id)
//id will be the textcontent without non-letter characters in lower case
let id = el.textContent.replace(/[^a-zA-Z]/g, '').toLowerCase() + 'Header'
while (ids.indexOf(id) !== -1) {
//add zzz's to the end until we have a unique id
id = id + 'zzz'
}
//ready to be tracked
ids.push(id)
//okay we can set now
el.id = id
})
let html = '<ol>'
headers.forEach(function (h) {
html += `<li><a href="#${h.id}">${h.textContent}</a></li>`;
});
html += '</ol>';
TOC.insertAdjacentHTML('beforeend', html);
}
document.addEventListener("DOMContentLoaded", function (event) {
htmlContents('#toc')
})
</script>
<style>
table {
border-collapse: collapse;
margin-top: 3ex;
}
table,
th,
td {
border: 1px solid black;
}
th,
td {
padding: 10px;
}
#linebreaking mtable {
background-color: lightyellow;
}
math {
font-family: "Stix Two Math", "Cambria Math", "Asana";
}
</style>
</head>
<body>
<h1>MathML transform tests</h1>
<p>The following tables contain MathML that is not part of core.
The page loads transforms that will transform the full MathML into MathML core.
The transforms will <em>not</em> run until you click the button below.
This allows you to see the effects of the transform.
</p>
<p>Examples:</p>
<div id="toc"></div> <!-- TOC auto built from h2's-->
<h2>General MathML Elements and Attributes</h2>
<label>
Click to see the effect of the transform on the following table:
<button onclick="transform(general)">Apply Transform</button>
</label>
<table id="general">
<tr>
<th>Description</th>
<th>Math example</th>
</tr>
<tr>
<td>
mfenced
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mfenced open="[" separators=";" close="]">
<mn>0</mn>
<mn>1</mn>
</mfenced>
</math>
</td>
</tr>
<tr>
<td>
under/over scripts with an mo that should be displayed as an accent
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mover>
<mi>x</mi>
<mo>⇀</mo>
</mover>
<mo>+</mo>
<mover>
<mi>x</mi>
<mo>^</mo>
</mover>
<mo>+</mo>
<munder>
<mo>∑</mo>
<mrow>
<mi>x</mi>
<mo>∈</mo>
<mi>D</mi>
</mrow>
</munder>
<mi>f</mi>
<mo>(</mo>
<mi>x</mi>
<mo>)</mo>
</math>
</td>
</tr>
<tr>
<td>
munder alignment left/left/right<br>
first example is with stretchy operator
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<munder align="left" accentunder="true">
<mrow>
<mi>r</mi>
<mo>+</mo>
<mi>a</mi>
</mrow>
<mo>⇀</mo>
</munder>
<mo>,</mo>
<munder align="left">
<mrow>
<mi>l</mi>
<mo>+</mo>
<mi>a</mi>
<mo>+</mo>
<mi>b</mi>
</mrow>
<mo accent="true">△</mo>
</munder>
<mo>,</mo>
<munder align="right" accentunder="true">
<mrow>
<mi>r</mi>
<mo>+</mo>
<mi>a</mi>
<mo>+</mo>
<mi>b</mi>
</mrow>
<mo>□</mo>
</munder>
</math>
</td>
</tr>
<tr>
<td>
mover alignment left/left/right<br>
first example is with stretchy operator
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mover align="left" accent="true">
<mrow>
<mi>r</mi>
<mo>+</mo>
<mi>a</mi>
</mrow>
<mo>⇀</mo>
</mover>
<mo>,</mo>
<mover align="left">
<mrow>
<mi>l</mi>
<mo>+</mo>
<mi>a</mi>
<mo>+</mo>
<mi>b</mi>
</mrow>
<mo accent="true">△</mo>
</mover>
<mo>,</mo>
<mover align="right" accent="true">
<mrow>
<mi>r</mi>
<mo>+</mo>
<mi>a</mi>
<mo>+</mo>
<mi>b</mi>
</mrow>
<mo>□</mo>
</mover>
</math>
</td>
</tr>
<tr>
<td>
munderover alignment left/left/right<br>
first example is with stretchy operator
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<munderover align="left" accentunder="true" accent="true">
<mrow>
<mi>r</mi>
<mo>+</mo>
<mi>a</mi>
</mrow>
<mo>⇀</mo>
<mo>⇁</mo>
</munderover>
<mo>,</mo>
<munderover align="left">
<mrow>
<mi>l</mi>
<mo>+</mo>
<mi>a</mi>
<mo>+</mo>
<mi>b</mi>
</mrow>
<mi>left</mi>
<mo accent="true">△</mo>
</munderover>
<mo>,</mo>
<munderover align="right" accentunder="true" accent="true">
<mrow>
<mi>r</mi>
<mo>+</mo>
<mi>a</mi>
<mo>+</mo>
<mi>b</mi>
</mrow>
<mo>□</mo>
<mi>right</mi>
</munderover>
</math>
</td>
</tr>
<tr>
<td>
bevelled fraction
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mi>f</mi>
<mo>(</mo>
<mfrac bevelled="true">
<mrow>
<mi>x</mi>
<mo>+</mo>
<mn>1</mn>
</mrow>
<mrow>
<mi>x</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
</mfrac>
<mo>)</mo>
<mo>+</mo>
<mn>1</mn>
</math>
</td>
</tr>
<tr>
<td>
numerator alignment left/center/right and nested with right/left
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mfrac numalign="left">
<mn>1</mn>
<mrow>
<mi>x</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
</mfrac>
<mo>+</mo>
<mfrac numalign="center">
<mn>22</mn>
<mrow>
<mi>x</mi>
<mo>-</mo>
<mn>2</mn>
</mrow>
</mfrac>
<mo>+</mo>
<mfrac numalign="right">
<mrow>
<mn>333</mn>
</mrow>
<mrow>
<mi>x</mi>
<mo>-</mo>
<mi>y</mi>
<mo>-</mo>
<mn>3</mn>
</mrow>
</mfrac>
<mo>+</mo>
<mfrac numalign="left" denomalign="right">
<mrow>
<mfrac numalign="right">
<mn>4</mn>
<mrow>
<mi>x</mi>
<mo>+</mo>
<mi>y</mi>
</mrow>
</mfrac>
</mrow>
<mrow>
<mi>x</mi>
<mo>-</mo>
<mi>y</mi>
<mo>-</mo>
<mn>3</mn>
</mrow>
</mfrac>
</math>
</td>
</tr>
<tr>
<td>
denominator alignment left/center/right and nested with left/right
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mfrac denomalign="left">
<mrow>
<mi>a</mi>
<mo>+</mo>
<mi>b</mi>
<mo>+</mo>
<mi>c</mi>
</mrow>
<mn>3</mn>
</mfrac>
<mo>+</mo>
<mfrac denomalign="center">
<mstyle displaystyle="true">
<mi>x</mi>
<mo>+</mo>
<mi>y</mi>
<mo>+</mo>
<mn>1234</mn>
</mstyle>
<mstyle displaystyle="true">
<mn>3</mn>
</mstyle>
</mfrac>
<mo>+</mo>
<mfrac denomalign="right">
<mstyle displaystyle="true">
<mi>a</mi>
<mo>+</mo>
<mi>b</mi>
<mo>+</mo>
<mi>c</mi>
</mstyle>
<mstyle displaystyle="true">
<mn>3</mn>
</mstyle>
</mfrac>
<mo>+</mo>
<mfrac denomalign="right">
<mrow>
<mfrac numalign="left" denomalign="right">
<mn>4</mn>
<mrow>
<mi>x</mi>
<mo>+</mo>
<mi>y</mi>
</mrow>
</mfrac>
</mrow>
<mrow>
<mn>3</mn>
</mrow>
</mfrac>
</math>
</td>
</tr>
<tr>
<td>
mfrac with named linethickness (none, thin, medium, thick, 8px)
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
<mo>+</mo>
<mfrac linethickness="thin">
<mn>1</mn>
<mn>3</mn>
</mfrac>
<mo>+</mo>
<mfrac linethickness="medium">
<mn>1</mn>
<mn>4</mn>
</mfrac>
<mo>+</mo>
<mfrac linethickness="thick">
<mn>1</mn>
<mn>5</mn>
</mfrac>
<mo>+</mo>
<mfrac linethickness="8px">
<mn>1</mn>
<mn>6</mn>
</mfrac>
</math>
</td>
</tr>
<tr>
<td>
fraction with named mathsize for numerator
(none, small, medium, big, 20px)
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
<mo>+</mo>
<mfrac>
<mn mathsize="small">1</mn>
<mn>3</mn>
</mfrac>
<mo>+</mo>
<mfrac>
<mn mathsize="medium">1</mn>
<mn>4</mn>
</mfrac>
<mo>+</mo>
<mfrac>
<mn mathsize="big">1</mn>
<mn>5</mn>
</mfrac>
<mo>+</mo>
<mfrac>
<mn mathsize="20px">1</mn>
<mn>6</mn>
</mfrac>
</math>
</td>
</tr>
<tr>
<td>
mglyph -- example with lone mglyph in 'mi' and second with other chars. <br>
The second uses 'em's (which must convert to px) and also valign set to push the top down to the baseline.
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mi>f</mi>
<mo>(</mo>
<mi><mglyph src="./simple-knot.png" width="64px" alt="simple knot"/></mi>
<mo>,</mo>
<mi>x<mglyph src="./simple-knot.png" height="2em" valign="-2em" alt="simple knot shifted down"/>z</mi>
<mo>)</mo>
</math>
</td>
</tr>
<tr>
<td>
ms -- default quotes and curly quotes; internal quotes should be escaped
</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mi>f</mi>
<mo>(</mo>
<ms>normal "s</ms>
<mo>,</mo>
<ms lquote="“" rquote="”">open/close quotes</ms>
<mo>)</mo>
</math>
</td>
</tr>
</table>
<h2>mpadded Attribute Pseudo Values</h2>
<label>
Click to see the effect of the transform on the following table:
<button onclick="transform(mpadded)">Apply Transform</button>
</label>
<table id="mpadded">
<tr>
<th>Description</th>
<th>Math example</th>
</tr>
<tr style="vertical-align: top;">
<td>
mpadded -- pseudo units (width, depth, height) are not part of core
<br>
Yellow is space child, blue is mpadded dimensions.
'lspace'/'voffset' are set so that a yellow square should be centered inside a blue square,
with the blue square having twice the side length of the yellow square.
<h3>Before transform</h3>
<div id="beforeAttrValues"></div>
<h3>After transform</h3>
<div id="afterAttrValues"></div>
</td>
<td id='mpaddedTest'>
<div style="width: 300px; text-align:left;">
<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline">
<mn>1</mn>
<mpadded lspace="0.5width" voffset="-.25height" width="2width" height="1.5height" depth="3depth"
style="background: lightblue;">
<mspace width="30px" height="20px" depth="10px" style="background: yellow;"></mspace>
</mpadded>
<mo>,</mo>
<mn>2</mn>
<mpadded lspace="15px" voffset="-5px" width="6depth" height="1.0width" depth="1.5height"
style="background: lightblue;">
<mspace width="30px" height="20px" depth="10px" style="background: yellow;"></mspace>
</mpadded>
<mo>,</mo>
<mn>3</mn>
<mpadded lspace="50%width" voffset="-50%depth" width="600%depth" height="100%width"
depth="150%height" style="background: lightblue;">
<mspace width="30px" height="20px" depth="10px" style="background: yellow;"></mspace>
</mpadded>
<mo>,</mo>
<mn>4</mn>
<mpadded lspace="50%width" voffset="-50%depth" width="2width" height="150%height"
depth="300%depth" style="background: lightblue;">
<mspace width="30px" height="20px" depth="10px" style="background: yellow;"></mspace>
</mpadded>
<mn>5</mn>
</math>
</div>
</td>
<script>
function showAttrs(el, displayEl) {
const mpaddedEls = el.getElementsByTagName('mpadded');
let attrStrings = '';
for (let i = 0; i < mpaddedEls.length; i++) {
if (i > 0) {
attrStrings += '\n';
}
attrStrings += `mpadded ${i + 1}: `;
const attrs = mpaddedEls[i].attributes;
for (let j = 0; j < attrs.length; j++) {
attrStrings += ` ${attrs[j].name}="${attrs[j].value}"`;
}
}
displayEl.innerText = attrStrings;
}
showAttrs(window.mpaddedTest, window.beforeAttrValues);
new MutationObserver(
(mutationsList, observer) => showAttrs(window.mpadded, window.afterAttrValues))
.observe(window.mpadded, { attributes: true, subtree: true });
</script>
</tr>
</table>
<h2>menclose</h2>
<label>
Click to see the effect of the transform on the following table:
<button onclick="transform(menclose)">Apply Transform</button>
</label>
<table id="menclose">
<tr>
<th>Description</th>
<th>Math example</th>
</tr>
<tr style="vertical-align: top;">
<td> Box with 'strikes' in all directions</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline">
<menclose notation='horizontalstrike updiagonalstrike downdiagonalstrike verticalstrike box'>
<mfrac>
<mrow>
<mi>x</mi>
<mo>+</mo>
<mi>y</mi>
</mrow>
<mn>2</mn>
</mfrac>
</menclose>
</math>
</td>
</tr>
<tr style="vertical-align: top;">
<td> Box with double-ended arrows in all directions</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline">
<menclose notation='updownarrow leftrightarrow northeastsouthwestarrow northwestsoutheastarrow box'>
<mfrac>
<mrow>
<mi>x</mi>
<mo>+</mo>
<mi>y</mi>
</mrow>
<mn>2</mn>
</mfrac>
</menclose>
</math>
</td>
</tr>
<tr style="vertical-align: top;">
<td>Circle and rounded box with horizontal/vertical strikes</td>
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline">
<menclose notation='circle roundedbox horizontalstrike verticalstrike'>
<msqrt>
<mrow>
<mi>x</mi>
<mo>+</mo>
<mi>y</mi>
</mrow>
</msqrt>
<mo>+</mo>
<mi>z</mi>
</menclose>
</math>
</td>
</tr>
</table>
<h2>Linebreaks in Display MathML</h2>
<label>
Click to see the effect of the transform on the following table:
<button onclick="transform(linebreaking)">Apply Transform</button>
</label>
<p>Custom element -- should break to the width of a line</p>
<hr>
<math-with-linebreaks>
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
<mrow>
<msub><mi>a</mi><mn>1</mn></msub><mo>+</mo><msub><mi>a</mi><mn>2</mn></msub><mo>+</mo><msub><mi>a</mi><mn>3</mn></msub><mo>+</mo><msub><mi>a</mi><mn>4</mn></msub><mo>+</mo><msub><mi>a</mi><mn>5</mn></msub><mo>+</mo><msub><mi>a</mi><mn>6</mn></msub><mo>+</mo><msub><mi>a</mi><mn>7</mn></msub><mo>+</mo><msub><mi>a</mi><mn>8</mn></msub><mo>+</mo><msub><mi>a</mi><mn>9</mn></msub><mo>+</mo><msub><mi>a</mi><mn>10</mn></msub>
<mo>+</mo><msub><mi>a</mi><mn>11</mn></msub><mo>+</mo><msub><mi>a</mi><mn>12</mn></msub><mo>+</mo><msub><mi>a</mi><mn>13</mn></msub><mo>+</mo><msub><mi>a</mi><mn>14</mn></msub><mo>+</mo><msub><mi>a</mi><mn>15</mn></msub><mo>+</mo><msub><mi>a</mi><mn>16</mn></msub><mo>+</mo><msub><mi>a</mi><mn>17</mn></msub><mo>+</mo><msub><mi>a</mi><mn>18</mn></msub><mo>+</mo><msub><mi>a</mi><mn>19</mn></msub><mo>+</mo><msub><mi>a</mi><mn>20</mn></msub>
<mo>+</mo><msub><mi>a</mi><mn>21</mn></msub><mo>+</mo><msub><mi>a</mi><mn>22</mn></msub><mo>+</mo><msub><mi>a</mi><mn>23</mn></msub><mo>+</mo><msub><mi>a</mi><mn>24</mn></msub><mo>+</mo><msub><mi>a</mi><mn>25</mn></msub><mo>+</mo><msub><mi>a</mi><mn>26</mn></msub><mo>+</mo><msub><mi>a</mi><mn>27</mn></msub><mo>+</mo><msub><mi>a</mi><mn>28</mn></msub><mo>+</mo><msub><mi>a</mi><mn>29</mn></msub><mo>+</mo><msub><mi>a</mi><mn>30</mn></msub>
<mo>+</mo><msub><mi>a</mi><mn>31</mn></msub><mo>+</mo><msub><mi>a</mi><mn>32</mn></msub><mo>+</mo><msub><mi>a</mi><mn>33</mn></msub><mo>+</mo><msub><mi>a</mi><mn>34</mn></msub><mo>+</mo><msub><mi>a</mi><mn>35</mn></msub><mo>+</mo><msub><mi>a</mi><mn>36</mn></msub><mo>+</mo><msub><mi>a</mi><mn>37</mn></msub><mo>+</mo><msub><mi>a</mi><mn>38</mn></msub><mo>+</mo><msub><mi>a</mi><mn>39</mn></msub><mo>+</mo><msub><mi>a</mi><mn>40</mn></msub>
</mrow>
</math>
</math-with-linebreaks>
<hr>
<table id="linebreaking" style="table-layout: fixed; width: 100vw;">
<colgroup> <col style="width: 40%;"> <col style="width: 60%;"> </colgroup>
<tr>
<td>
Linebreaks: Forced linebreak before second '=' and another before "+4x+1".
<br>
Indents: 2nd line on "=" 3rd line on "+" after "="
<br>
maxwidth = 30em -- shouldn't affect linebreaks (tests non-px value)
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" maxwidth="30em" display="block">
<mrow>
<mrow>
<mi>f</mi>
<mo>⁡</mo>
<mo>(</mo>
<mi>x</mi>
<mo>)</mo>
</mrow>
<mo id='eq1-equals'>=</mo>
<mrow>
<msup>
<mrow>
<mo>(</mo>
<mrow>
<mi>x</mi>
<mo>+</mo>
<mn>1</mn>
</mrow>
<mo>)</mo>
</mrow>
<mn>4</mn>
</msup>
<mo linebreak='newline' linebreakstyle='before' indentalign='id' indenttarget='eq1-equals'>=
</mo>
<mrow>
<msup>
<mi>x</mi>
<mn>4</mn>
</msup>
<mo id='eq1-plus'>+</mo>
<mrow>
<mn>4</mn>
<mo>⁢</mo>
<msup>
<mi>x</mi>
<mn>3</mn>
</msup>
</mrow>
<mo>+</mo>
<mrow>
<mn>6</mn>
<mo>⁢</mo>
<msup>
<mi>x</mi>
<mn>2</mn>
</msup>
</mrow>
<mo linebreak='newline' linebreakstyle='before' indentalignlast='id'
indenttarget='eq1-plus'>+</mo>
<mrow>
<mn>4</mn>
<mo>⁢</mo>
<mi>x</mi>
</mrow>
<mo>+</mo>
<mn>1</mn>
</mrow>
</mrow>
</mrow>
</math>
</td>
</tr>
<tr>
<td>
Linebreaks: automatic. maxwidth = 190px
<br>
Indents: automatic
<td>
<math xmlns="http://www.w3.org/1998/Math/MathML" maxwidth="190px" display="block">
<mrow>
<mrow>
<mi>f</mi>
<mo>⁡<!--FUNCTION APPLICATION--></mo>
<mo>(</mo>
<mi>x</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<msup>
<mrow>
<mo>(</mo>
<mrow>
<mi>x</mi>
<mo>+</mo>
<mn>1</mn>
</mrow>
<mo>)</mo>
</mrow>
<mn>4</mn>
</msup>
<mo>=</mo>
<mrow>
<msup>
<mi>x</mi>
<mn>4</mn>
</msup>
<mo>+</mo>
<mrow>
<mn>4</mn>
<mo>⁢</mo>
<msup>
<mi>x</mi>
<mn>3</mn>
</msup>
</mrow>
<mo>+</mo>
<mn>6</mn>
<mo>⁢</mo>
<msup>
<mi>x</mi>
<mn>2</mn>
</msup>
<mo>+</mo>
<mrow>
<mn>4</mn>
<mo>⁢</mo>
<mi>x</mi>
</mrow>
<mo>+</mo>
<mn>1</mn>
</mrow>
</mrow>
</math>
</td>
</tr>
<tr>
<td>
Automatic linebreak (200px break width)<br>
Should be four lines: linebreak between the parens and also on '+'s<br>
Indentation: automatic<br>
There are no mrows in this test, so testing recreating structure also.
</td>
<td>
<math xmlns='http://www.w3.org/1998/Math/MathML' maxwidth='200px' indentalign="auto" display="block">
<mo id='lparen'>(</mo>
<msup>
<mi>x</mi>
<mn>4</mn>
</msup>
<mo>-</mo>
<mn>4</mn>
<mo>⁢</mo>
<msup>
<mi>x</mi>
<mn>3</mn>
</msup>
<mo>⁢</mo>
<mi>y</mi>
<mo>+</mo>
<mn>6</mn>
<mo>⁢</mo>
<msup>
<mi>x</mi>
<mn>2</mn>
</msup>
<mo>⁢</mo>
<msup>
<mi>y</mi>
<mn>2</mn>
</msup>
<mo>-</mo>
<mn>4</mn>
<mo>⁢</mo>
<mi>x</mi>
<mo>⁢</mo>
<msup>
<mi>y</mi>
<mn>3</mn>
</msup>
<mo>+</mo>
<msup>
<mi>y</mi>
<mn>4</mn>
</msup>
<mo>)</mo>
<mo linebreak="goodbreak" linebreakstyle='after' linebreakmultchar='×'>⁢</mo>
<mo>(</mo>
<msup>
<mi>x</mi>
<mn>4</mn>
</msup>
<mo>+</mo>
<mn>4</mn>
<mo>⁢</mo>
<msup>
<mi>x</mi>
<mn>3</mn>
</msup>
<mo>⁢</mo>
<mi>y</mi>
<mo>+</mo>
<mn>6</mn>
<mo>⁢</mo>
<msup>
<mi>x</mi>
<mn>2</mn>
</msup>
<mo>⁢</mo>
<msup>
<mi>y</mi>
<mn>2</mn>
</msup>
<mo>+</mo>
<mn>4</mn>
<mo>⁢</mo>
<mi>x</mi>
<mo>⁢</mo>
<msup>
<mi>y</mi>
<mn>3</mn>
</msup>
<mo>+</mo>
<msup>
<mi>y</mi>
<mn>4</mn>
</msup>
<mo>)</mo>
</math>
</td>
</tr>
<tr>
<td>
A manual linebreak at second equals; <br>
Automatic linebreak (should be with '•' added) and if it breaks there, "target" aligned with '(' <br>
Attributes tested: linebreakstyle, linebreakmultchar, linebreak, indentalign, indenttarget
</td>
<td>
<math xmlns='http://www.w3.org/1998/Math/MathML' display="block" linebreakmultchar='•' linebreakstyle='before'>
<mrow>
<msup>
<mrow>
<mo>(</mo>
<mrow>
<msup>
<mi>x</mi>
<mn>2</mn>
</msup>
<mo>-</mo>
<msup>
<mi>y</mi>
<mn>2</mn>
</msup>
</mrow>
<mo>)</mo>
</mrow>
<mn>4</mn>
</msup>
<mo id='equals-eq2'>=</mo>
<mrow>
<msup>
<mrow>
<mo>(</mo>
<mrow>
<mi>x</mi>
<mo>-</mo>
<mi>y</mi>
</mrow>
<mo>)</mo>
</mrow>
<mn>4</mn>
</msup>
<mo>⁢</mo>
<msup>
<mrow>
<mo>(</mo>
<mrow>
<mi>x</mi>
<mo>+</mo>
<mi>y</mi>
</mrow>
<mo>)</mo>
</mrow>
<mn>4</mn>
</msup>
</mrow>
<mo linebreak='newline' indentalign='id' indenttarget='equals-eq2'>=</mo>
<mrow>
<mrow>
<mo id='lparen-eq2'>(</mo>
<mrow>
<msup>
<mi>x</mi>
<mn>4</mn>
</msup>
<mo>-</mo>
<mrow>
<mn>4</mn>
<mo>⁢</mo>
<msup>
<mi>x</mi>
<mn>3</mn>
</msup>
<mo>⁢</mo>
<mi>y</mi>
</mrow>
<mo>+</mo>
<mrow>
<mn>6</mn>
<mo>⁢</mo>
<msup>
<mi>x</mi>
<mn>2</mn>
</msup>
<mo>⁢</mo>
<msup>
<mi>y</mi>
<mn>2</mn>
</msup>
</mrow>
<mo>-</mo>
<mrow>
<mn>4</mn>
<mo>⁢</mo>
<mi>x</mi>
<mo>⁢</mo>
<msup>
<mi>y</mi>
<mn>3</mn>
</msup>
</mrow>