=

When

When

Then integration by parts, differentiating and integrating i end up with

from 1 to -1

Doing that I end up with 0 after plugging back in for the u. but my calculator tells me the answer is

What am I doin wrong, I know I'm close...i think :P

PS: best part is, if i just substitute the -1 and 1 directly into the above equation...i get the right answer

EDIT: ....im suppose to put -1 and 1 in aren't i....shrug haha