please solve what you can

5 1. Use partial fraction decomposition to integrate: dx (x - 1) (x2 + 4) 2. Use trigonometric substitution to integrate: 4 / Vx2- 25 dx x 2 Integrate the following: 3. (4x - 3 dx x+1 4 . [ (ex - 1) 2 dx 3ex 5 . 5 x sec 2 x dx 6. [2 x16- 7X dx