I went wrong somewhere here. First let's say:
Let's integrate that by parts. Let's start with:
Next:
Let's integrate by parts again on that new integral because I think I can get back to the original integral:
So we have:
All together:
I don't think I did it right because the my next step appears to be a dead end:
I did something wrong with the coefficients or the signs methinks... or everything. That's always a possibility with me.