title: MathJax not rendering in Sphinx
body: <p>I have a documentation set in Sphinx reST.
  I've included sphinx.ext.mathjax in conf.py, and included the line "mathjax_path = '<a href="http://cdn.mathjax.org/mathjax/latest/MathJax.js" rel="nofollow">http://cdn.mathjax.org/mathjax/latest/MathJax.js</a>'".
  I believe that is all I need to do before adding markup to the rst files. But my equations aren't being rendered. For example,</p>
  
  <pre><code>:math:`a^2 + b^2 = c^2`
  </code></pre>
  
  <p>comes out of the browser as</p>
  
  <pre><code>\(a^2 + b^2 = c^2\)
  </code></pre>
  
  <p>No fancy font or anything. The HTML is</p>
  
  <pre><code>&lt;span class="math"&gt;\(a^2 + b^2 = c^2\)&lt;/span&gt;
  </code></pre>