Online equation editor

[Kulverstukas]

Just found this tool today. It's an online equation editor, the one like in LaTeX. Simple to use and equations are produced as images (format can be selected), link to embed are provided at the bottom. I think it's what people should use when they post mathematical problems.
Just look how this equation looks:

I don't even know how to write it in plain text

Anyway, this is the website: http://www.codecogs.com/products/eqneditor/editor.php?mode=NEW

[Axon]

Thank you , I need this because my work involves equations.+1

[gh0st]

nice added to favorites I might need it in a future .
wikipedia needs an program like this integrated in its wiki whats more wikipedia should upgrade its edit program because is so hard to edit articles to new people anyways *offtopic .
thanks