Cube Roots of Compound Expressions.

14. ${\displaystyle \frac{x(x+1)}{x-5}}$.

15. ${\displaystyle \frac{a+1}{a+5}}$.

16. $1$.

17. ${\displaystyle \frac{x(x+y)}{x+1}}$.

18. ${\displaystyle \frac{b}{a-b}}$.

19. $abc$.

20. ${\displaystyle \frac{(x+2y)(x+1)}{(x+y)(x+2)}}$.

Exercise50.

1. ${\displaystyle \frac{x+y}{z}}$.

2. ${\displaystyle \frac{12x+3y}{12x-4y}}$.

3. ${\displaystyle \frac{abd-21d^2}{21cd-7ab}}$.

4. ${\displaystyle \frac{x^2+x-2}{x^2-x-2}}$.

5. $1$.

6. ${\displaystyle \frac{x+y}{x^2-2xy+y^2}}$.

7. ${\displaystyle \frac{a+b}{a-b}}$.

8. $4(3a+8)$.

9. ${\displaystyle \frac{y+x}{y-x}}$.

10. $x$.

11. ${\displaystyle \frac{1}{x}}$.

12. ${\displaystyle \frac{x^2(x-3)}{x-2}}$.

13. $a-1$.