Hi, I am trying to study for a math test and there are a couple of questions I don't understand.

1) How would I integrate (x^{3}-x^{2}+x-1)/(x^{2}) dx? Could someone give me of an idea of what method I would use?

2) How would I use the substitution method to solve for (sqrt(lnx))/x? What would be my u? lnx or sqrt(lnx)?

3) How would I use substitution to integrate sin(3x)e^{(cos3x)}dx?

Any help with any of these is greatly appreciated. Even knowing where to start would be great. Thanks!