Help with writing an equation

[mikie1]

How does one do that? I did a seach an no luck. Its the function where one can draw intergrals and sumations.

[HallsofIvy]

It's not completely clear what you mean.

I suspect you are referring to the "special symbols" such as

"& int ;" ∫ or "& theta ;" θ . Notice that those symbols start with & and end with ; I put the spaces in so the code itself would show up.

You might also want to try "Tex", its more elaborate and information about it is given at
http://www.physicsforums.com/showthread.php?s=&threadid=8997

[Spectre5]

Also, when people type with the Tex, you can click on it and see how they wrote it....that works very well for learning how to write it, see examples of it....when I first learned it, I would go around the forums in search of post with Tex written in them and look at how they were done.