title: MathJax not rendering some equations properly on Github pages
body: <p>I've configured Mathjax on my Github pages site and it can render some equations properly but not others.</p>
  
  <p>It can render properly the following equations:</p>
  
  <pre><code>\\[ \frac{1}{n^{2}} \\]
  
  \\[ J(\theta) = \frac{1}{2m}[\sum_{i=1}^m(h_\theta (x^{(i)}) - y^{(i)})^2 + \lambda\sum_{j=1}^n\theta^2_j] \\]
  </code></pre>
  
  <p>But it can't render equations like below:</p>
  
  <pre><code>\\[ F'(\theta_*)=\lim\limits_{\theta\to\theta_*}\frac{F(\theta)-F(\theta_*)}{\theta-\theta_*} \\]
  </code></pre>
  
  <p>Can someone please see where the problem might be?</p>