HI, Are you sure this is correct? I can't integrate it (I'm assuming w.r.t. x) and I've put it into a few online integrators and they can't do it either.
You can start using symbols by pressing the sum symbol $\displaystyle \sum$ (second from end right on the bottom row of tool bars (on the ADVANCED editing box) and using latex language to write in between the "[TEX]" symbols that come up. Google latex for a basic intro. It'll make your time on here much more rewarding.
BW, MD