Why my jekyll site on github not work with mathjax?
<p>I start to build a jekyll site on github following this <a href="https://www.smashingmagazine.com/2014/08/build-blog-jekyll-github-pages/" rel="nofollow noreferrer">BLOG</a>.</p>

<p>OK it works.<a href="https://i.stack.imgur.com/QuKxZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QuKxZ.png" alt="changkaizhao.github.io"></a></p>

<p>I would like to add some math stuffs in my blog, I add a "mathjax.html" in "include folder"</p>

<pre><code>&lt;script type="text/x-mathjax-config"&gt;
      MathJax.Hub.Config({
      TeX: {
                equationNumbers: {
                            autoNumber: "AMS"
                                  }
           },
      tex2jax: {
                inlineMath: [ ['$','$'],
                            ['\(', '\)'] ],
                displayMath: [
                            ['$$','$$'] ],
                processEscapes:true,
               }
                 });
</code></pre>

<p></p>




<p>and then include this file in Layouts files(default.html page.html  post.html)</p>

<pre><code>    &lt;div class="wrapper-footer"&gt;
      &lt;div class="container"&gt;
        &lt;footer class="footer"&gt;
          {% include svg-icons.html %}
        &lt;/footer&gt;
      &lt;/div&gt;
   &lt;/div&gt;
      {% include analytics.html %}
 &lt;/body&gt;
  &lt;/html&gt;
 {% include mathjax.html %}
</code></pre>

<p>default.html</p>

<pre><code>---
layout: default
---
{% include mathjax.html %}

&lt;article class="page"&gt;

&lt;h1&gt;{{ page.title }}&lt;/h1&gt;

&lt;div class="entry"&gt;
  {{ content }}
&lt;/div&gt;
&lt;/article&gt;
</code></pre>

<p>page.html</p>

<pre><code>---
layout: default
---
&lt;article class="post"&gt;
 &lt;h1&gt;{{ page.title }}&lt;/h1&gt;

 &lt;div class="entry"&gt;
  {{ content }}
 &lt;/div&gt;

 &lt;div class="date"&gt;
   Written on {{ page.date | date: "%B %e, %Y" }}
 &lt;/div&gt;
  {% include disqus.html %}
 &lt;/article&gt;
 {% include mathjax.html %}
</code></pre>

<p>post.html</p>

<p>and add this line in post file</p>

<pre><code>$$ sin(x^2) $$
</code></pre>

<p>As a result ,the page show nothing ...
what 's wrong with it?</p>