divinenephron

Latex Everything can produce PDF documents of everything on your site with 
Latex. Or at least everything worth putting into a PDF.
Latex Everything can make PDF documents from individual posts and groups of 
posts like categories, tags and custom taxonomy terms. The plugins contains 
everything a theme needs to define its own Latex templates, and link to the PDFs 
produced.

Latex Everything

Produce PDF documents of everything on your site with Latex.

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.

Latex Everything vs Google Equation for WordPress