diff --git a/docs/statlab_corr_tau.rst b/docs/statlab_corr_tau.rst
index c3b54a14..849cf70b 100644
--- a/docs/statlab_corr_tau.rst
+++ b/docs/statlab_corr_tau.rst
@@ -175,9 +175,9 @@ where :math:`X_n` is a size :math:`n` by :math:`n` matrix, and :math:`1_n` is a
 Both tau-a and tau-b can be calculated as 
 
   .. math::
-    \tau_1 = g(Y_{1} \times_{car} Y_{1})
-    \tau_2 = g(Y_{2} \times_{car} Y_{2})
-    \tau = \frac{h(\tau_1 \times_{ele} \tau_2) }{ sqrt{h(abs(\tau_1))}sqrt{h(abs(\tau_2))} }
+    \tau_1 &= g(Y_{1} \times_{car} Y_{1}) \\
+    \tau_2 &= g(Y_{2} \times_{car} Y_{2}) \\
+    \tau &= \frac{h(\tau_1 \times_{ele} \tau_2) }{ \sqrt{h(abs(\tau_1))}\sqrt{h(abs(\tau_2))} }
 
 
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