tigerlihao

This plugin can let you add mathematical equations to your posts using latex. 
Google chart API is used in this plugin to turn the latex strings to equation images. 
The equation images will be stored on your site, so it will be efficient.
To add equations in your articles, just surround the latex script with <code>[eq]</code> and <code>[/eq]</code> tags. 
For example, add following codes <code>[eq]\alpha+\beta\geq\gamma[/eq]</code> in your posts.

Google Equation for WordPress

Using Google chart API for LaTeX to add mathematical equations as images.

Automattic

Michael Adams (mdawaffe)

sidney

NOTE: For must users, we recommend using <a href="http://jetpack.me/" rel="nofollow ugc">Jetpack</a> and 
its <a href="http://jetpack.me/support/beautiful-math-with-latex/" rel="nofollow ugc">Beautiful Math feature</a>. 
WP LaTeX offers additional control since it allows you to host your own LaTeX 
image server.
Writing equations and formulae is a snap with LaTeX, but really hard on a website. 
No longer. This plugin combines the power of LaTeX and the simplicity of WordPress 
to give you the ultimate in math blogging platforms.
Wow that sounds nerdy.
<h3>Other Plugins</h3>
<a href="http://sixthform.info/steve/wordpress/index.php?p=13" rel="nofollow ugc">Steve Mayer’s LatexRender Plugin</a> 
is based on a <a href="http://www.mayer.dial.pipex.com/tex.htm" rel="nofollow ugc">LaTeX Rendering Class</a> originally 
written by Benjamin Zeiss. Its requirements are somewhat different and has a different 
installation procedure.
<a href="https://wordpress.org/plugins/mathjax-latex/" rel="ugc">MathJax-LaTeX</a>
<a href="https://wordpress.org/plugins/simple-mathjax/" rel="ugc">Simple Mathjax</a>

WP LaTeX

WP LaTeX creates PNG images from inline $\LaTeX$ code in your posts and comments.

Google Equation for WordPress vs WP LaTeX