Using MathJax to write equations on blogs

So i just installed mathjax and i want to check it out and see if it works $ x^n + x_n = 5 $
and $$ a*b*c = x^a + y^b $$

 And it works! 
So, MathJax is a java script which can be used to write beautiful equations using TeX on websites. Read this blog post  for the installation process. Apparently there are two ways of going about it. 
One is to install MathJax on the server where your website is hosted. 
The other, especially in the case of blogs, is to add a certain script to the html template of the blog.  The setup instructions for a blogger site have been mentioned and i'm sure the parallels on WordPress and Tumblr can be figured out without much trouble. 

 Using this in the coming blogposts should be fun :D 

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