Special Rules.

8. ${\displaystyle \frac{x^3{y}^3+z^3}{xy+z}}$.

9. ${\displaystyle \frac{a^3{b}^3+8}{ab+2}}$.

10. ${\displaystyle \frac{125a^3+b^3}{5a+b}}$.

11. ${\displaystyle \frac{a^3+8b^3}{a+2b}}$.

12. ${\displaystyle \frac{a^6+64}{a^2+4}}$.

13. ${\displaystyle \frac{a^9+27}{a^3+3}}$.

14. ${\displaystyle \frac{8a^6+b^3}{2a^2+b}}$.

15. ${\displaystyle \frac{a^{12}+x^6{y}^6}{a^4+x^2{y}^2}}$.

16. ${\displaystyle \frac{x^{15}+a^9{b}^9}{x^5+a^3{b}^3}}$.

17. ${\displaystyle \frac{27x^3{y}^3+z^{12}}{3xy+z^4}}$.

18. ${\displaystyle \frac{x^3{y}^3{z}^3+1}{xyz+1}}$.

19. ${\displaystyle \frac{8a^3{b}^3{c}^3+27}{2abc+3}}$.

20. ${\displaystyle \frac{1+64x^3{y}^3{z}^3}{1+4xyz}}$.

21. ${\displaystyle \frac{1+27a^6{b}^3{c}^3}{1+3a^{2}bc}}$.

Find by division the quotient of:

22. ${\displaystyle \frac{x^4-y^4}{x-y}}$.

23. ${\displaystyle \frac{x^4-y^4}{x+y}}$.

24. ${\displaystyle \frac{x^5-y^5}{x-y}}$.