Hi

I've been trying out some exam questions but have become stuck on one and was hoping someone out there might be able to help me.

The question is:

Evaluate using the method of residues

So far I have that

=

as and

I've tried to multiply all of this out and tidy up but the algebra is causing me problems from this point on and I was hoping you might be able to tell me where I'm going wrong.

Any suggestions would be gratefully appreciated

Thanks