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## Main Question or Discussion Point

I'm new to physicsforums, so my math typing is limited to the standard keystrokes. 1/x!, 2x^2. d/dx ln(3^(x+7)), for example. SO how do I do the nice summation symbols, imaginary number

Thanks!

PS to admins: Sorry if this is in the wrong place, I wasn't sure where I should put it.

*i*, derivative operator, etc.?Thanks!

PS to admins: Sorry if this is in the wrong place, I wasn't sure where I should put it.