Topic: Integration Bu substitution

Hi, I was hoping you could solve this question using integration By substitution. Solve the first 15 questions and the questions in green(Must). Please keep your handwriting neat, provide each step and capture your work using a cam scanner.

1. 3x3 Vr' + 5dr 12. 23. (212 + 3)2 2. 23 (2 +2 )dr sin (x) 13. - 12 24. ecos(#) sin(t) dt 3. V4 + 3rdx 14. e sin(e] ) dx 161 25. dx 4. dt 8r (1 - 6t) 15. 26. tan (x) 1+ 12 -dx 5. I cos(x? ) dr - 72 + 1 27. 1813 (313 +3)3 dr 6. sec (1/x) -dx 17. -12x3(4x3 - 1)3 dr 28. sin (In()) 12 dr -1/2 7. ese(nt) cot(at) dt 18. sec(20) tan(20) de 29. (4x2 + 2)2 8. 13 (x3 + 5) dr 19. Gx(23 - 1)3 dz 30. ex + 1 - da 20. VEsin(1 + 3/2) dr 31. 10. (3t + 2)24 dt 24r 21. - 32. sin (c) (4x2 + 4)2' 1 + cos (X) /2 11. cos(r ) sin(sin(x)) dr 22. / (1 + tan (0))" sec ' (0) de 1 33. cos-(t) /1 + tan(t)