BioQUEST found a great way to add equations to a blog–an absolute must for a quantitative post:

<div style=”text-align:center;width:100%” ><img src=”http://www.mathtran.org/cgi-bin/mathtran?D=3;tex=ex%3A%20%5C%3B%20%5Cfrac%7B1%7D%7B3%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20″ alt=”ex: ; frac{1}{3}
“/></div>
All you need to do is write the equation in LateX, convert to HTML, and copy the HTML into your blog.
It has an easier editor to write equations, similar to Word’s equation editor, i.e., point and click on symbols and it will figure out the correct LateX language.

$int f(x),dx$

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