So here's the problem.

Let

Show that

My initial approach was to go by integration by parts, letting and , this leads me to

Now this has a in it and also a which leads me to think I might be on the right track. However it looks such a mess, that I can't help but think I've made a mistake somewhere. If I haven't then I really can't see how to progress from here either.

Any help is much appreciated

Stonehambey