Best math lib for displaying formulas

I know PHPMathPublisher but it's not OOP and uses lots of deprecated functions. But afteral it's perfect. Simple user interface and s开发者_开发百科o on. But are there anything better for PHP 5.3?

If you know or use LaTeX, then you could look into using Mathjax. It's a JavaScript library that you can use to render LaTeX in the browser.