How to show LaTex in Blogger

How to show LaTex in Blogger, taken from this blog. See this post to view an example in our blog.
Include this before </head> in your Template:

<script type='text/x-mathjax-config'> MathJax.Hub.Config({tex2jax: {inlineMath: [[&#39;$&#39;,&#39;$&#39;], [&#39;\\(&#39;,&#39;\\)&#39;]]}}); </script> 
<script src='http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML' type='text/javascript'> </script>