Send complex math expressions over email and IM, without requiring any special software. It's also great for previewing LaTeX on the fly and generating images for embedding in your webpages.
Standard LaTeX with AMS extensions and colors. In the default "equation" mode, input is formatted as if surrounded by \[ and \]. Use "paragraph" mode and type your \[ and \] manually if you wish to typeset multiple equations.
Click “make mathURL” to generate a permanent mathURL. It will be shown in red, like http://mathurl.com/5euwuy. This short link will now forever refer to your equation!
The red mathURL links to a page on this site with your equation. To embed an equation in some other webpage, you can either save the image that you get and upload it to your web host, or link directly to the image on this site: click once on the formatted equation, and use the address of the image that you get (e.g. http://mathurl.com/5euwuy.png) as the address of your image (e.g. <img src="http://mathurl.com/5euwuy.png">).
Here's some examples to get you started! Click through to see how each of these is done.
Check out the blog, or send email to mathurl at mathurl dot com.