1. 3(x - 4)

2. 5(2y + 3)

3. a(a - 3)

4. 2x(x + 4)

5. 2y(2y - 3)

6. 3(6t² + 3t - 2)

7. a(10a² + a - 5)

8. 3x²(4x + 5)

9. 6x²y(2y + 3x)

10. 15az(a² + 2 + z²)

11. (x - 2)(3x + 4)

12. (x + 5)(2x - 3)

13. (2y - 3)(3a + 7)

14. 7(2x² - x + 1)

15. (3y - 1)(y² + 1)

16. (x + 1)(a + 2)

17. (3a + 4)(b + 5)

18. (y + 3)(y + x)

19. (2x + 3)(4x + a)

20. (3x + 2)(x² - 7)

21. (2y + 1)(y³ - 5)

22. (x - 3)(x + 7)

23. (t + 6)(t + 2)

24. (y - 2)(2y + 9)

25. (3b + 5)(b - 2)

26. (3x - 1)(3x - 4)

27. (x - 1)(x + 2)

28. x = 2 or x = 5

29. x = 3 or x = -2

30. x = 1/2 or x = 4

31. x = 0 or x = 4/3

32. y = 0 or y = 9

33. x = -3/2 or x = 1/4

34. x = 0 or x = 6

35. y = 0 or y = -4

36. x = 0 or x = 3/2

37. t = 0 or t = 4

38. x = 0 or x = 3

39. y = 0 or y = 8

40. x = 4 or x = 6

41. m = -5 or m = 3

42. x = 3/2 or x = -2/3