LaTeX (usually written this way) is an open source (FREE) typesetting program available at www.tug.org that is largely used by mathematicians to create mathematical works. Ever wondered how your math textbook was typeset? You guessed it! .
Here is some very simple code to type in to try it out. If you type code, in the widget creates an image that you can easily copy and paste into an email or website (works well with Chrome and Firefox but not Safari). \pi \alpha \frac{1}{2} \sqrt{25} = \pm 5 |