The first can be solved integrating by parts and then performing a substitution.
The second contains an expression of the form . Try substituting .
I'm still having trouble on both. On the first integral I've substituted then I did parts and got stuck. On the second one I did trig sub but I get stuck when you plug the original variables back in (what does equal?). Thanks for both your help so far, but I still need a little bit more help.