Plug into possibility
Add new features or connect your favorite tools with thousands of plugins — available on all paid WordPress.com plans.
mathematics
4 plugins
MathJax-LaTeXThis plugin enables MathJax (http://www.mathjax.org) functionality for WordPress (http://www.wordpress.org).
WPMathPubRender mathematical equations in WordPress as PNG images using pmath native syntax or LaTeX input with server-side rendering.
Google Equation for WordPressUsing Google chart API for LaTeX to add mathematical equations as images.
WP CalculatorWP Calculator is a free simple calculator for your blog. Originaly developed from http://www.bmgadg.com/calculator.php script.