Math Integration - Hurry

Please only answer Part 2:
Find the integral and simplify where reasonable

http://i42.tinypic.com/25p4a61.jpg



I have answered some of them. I am not sure, but for the 2a, 2b, 2d, I used the integration of substitution (u substitution).

For 2c, I don't know if I should use integration by parts or U sub ( because I couldn't find anything match)


Please help me solve them, so I can check if I am correct

thanks