My problem is I don't i don't know what to substitute in for f(x) and g(x) when i try to use integration by parts for this particular integral.

I can kind of get thorough it about halfway if i use and . but i end up with my second integral being this:

and i'm not sure how to get

As my answer if i integrate that last one. I would post all my work but i'm kind of in a hurry. So thank you and I appreciate your help. :)