simplify each product

1. (3c + 13)(13c + 3)
2. (3q^2 + 6)(2q - 5)
3. (j - 12)(j - 11)
4. (7h + 6)(7h - 6)
5. (3a + 2)(a - 2)
6. (x + 6)(x - 7)
7. (3z - 4)(7z - 5)
8. (-3z + 7)(4z - 8)
9. (c + 4)(c^2 - 3c + 5)
10. (p^2 - 2p + 5)(p - 7)
11. (8w - 3)(4w - 7)
12. (t + 7)(2t - 4)
13. (p - 10)(2p + 5)
14. (2m + 11)(6m - 1)
15. (-3t + 5)(-3t - 2)
16. (4x^2 + 2x + 3)(3x - 8)