How to input a mathematical formula?

Sample:

<img src="http://www.google.com/chart?cht=tx&chf=bg,s,FFFFFF00&chco=000000&chl=e^z=\sum^{\infty}_{n=0}\frac{z^n}{n!}" />

The bold and italic text is value of chl, the actual LaTeX string.

Ref:

Google's LaTex https://sites.google.com/site/gencoreoperative/index/articles-and-hacks/google-s-latex

Deprecated

1. Visit http://thornahawk.unitedti.org/equationeditor/equationeditor.php to write the formula.

2. Paste the formula code to http://www.texify.com/links.php and click Texify.

3. Paste the content of Code for web pages.