1. - 3p^3 + 7p^2 - 3
2. 5a^3 - 5a^2
3. 6 + 7n^3
4. - 6n^3
5. a^2 + 2r^4
6. 9r^3 + 2r^4
7. 1
8. 6x^4 - 6x
9. - 7k^4 - 11k^2 + 6
10. 2n^5 - 2n^4 + 3n + 3
11. 14a^5 + 14a^4 - 10a^3 - 16a
12. - 14n^4 - 7n^2 + 8n + 7
13. 18x^5 + 6x^4 + 12x^3
14. 7r^3 - 3r^2 + 20r
15. 8n - 8n^4
16. - 2x^5 + 10x^4 + 5x + 14
17. 4x^5 - 15x^3 - 11x - 1
18. 5a^5 + 23a^2 - 11a
19. 15v^5 + 4v^3 - 24v^2
20. 2b^4 + 15b^3 - 3
