AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.pidevelopers.calculus"
    android:versionCode="2"
    android:versionName="1.0.1" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />

    <application
        android:icon="@drawable/r"
        android:label="Pebble"
        android:theme="@style/Theme.AppCompat.Light.DarkActionBar" >
        <activity
            android:name=".MainActivity"
            android:label="Pebble"
            android:theme="@style/Theme.AppCompat.Light.DarkActionBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".Calculus"
            android:label="@string/app_name"
            android:theme="@style/Theme.AppCompat.Light.DarkActionBar" >
            <intent-filter>
            </intent-filter>
        </activity>
        <activity
            android:name=".DoDiff"
            android:label="@string/app_name"
            android:theme="@style/Theme.AppCompat.Light.DarkActionBar" >
            <intent-filter>
            </intent-filter>
        </activity>
        <activity
            android:name=".Diffrentiation"
            android:label="@string/app_name"
            android:theme="@style/Theme.AppCompat.Light.DarkActionBar" >
            <intent-filter>
            </intent-filter>
        </activity>
        <activity
            android:name=".integr"
            android:label="@string/app_name"
            android:theme="@style/Theme.AppCompat.Light.DarkActionBar" >
            <intent-filter>
            </intent-filter>
        </activity>
        <activity
            android:name=".DoInt"
            android:label="@string/app_name"
            android:theme="@style/Theme.AppCompat.Light.DarkActionBar" >
            <intent-filter>
            </intent-filter>
        </activity>
        <activity
            android:name=".About"
            android:label="@string/title_activity_about" >
        </activity>
    </application>

</manifest>