Hi. I m finding hard to solve these questions

1.

integration of

(x+1)(x^2 + 2x -5)^(1/2) dx

2. integration of

x^2 / (x+2)^3 dx

3. integration of

cos^3(x)/sin^3(x) dx

4. integration of

(3 − sin(3x)) cos(3x) dx

thank you so much for your help

I really appreciate it.

these questions might be an easy piece of cake ..