I need help with 4 of these. I tried them, but I keep getting the wrong answer.

1. Evalute the integral of (sin(8x))^3*(cos(8x))^2*dx. Use C to denote an arbitrary constant.

2. Evalute the integral of (cos(5x))^3*dx. Use C to denote an arbitrary constant.

3. Evalute the integral of csc(3x)dx. Use C to denote an arbitrary constant.

4. Evalute the integral of (2-2sinx)/cosx dx. Use C to denote an arbitrary constant.