Cube Roots of Compound Expressions.

13. ${\displaystyle \frac{x}{x-1}}$.

14. ${\displaystyle \frac{y}{x^2+3xy+9y^2}}$.

15. ${\displaystyle \frac{x+1}{x-5}}$.

16. ${\displaystyle \frac{x+1}{x-2}}$.

17. ${\displaystyle \frac{a+b+c}{a}}$.

18. ${\displaystyle \frac{x+5}{x+3}}$.

19. ${\displaystyle \frac{x+1}{x+3}}$.

[2]Exercise43.

1. $a+b+{\displaystyle \frac{2}{a-b}}$.

2. $a-b-{\displaystyle \frac{2}{a+b}}$.

3. $a-1+{\displaystyle \frac{2a}{a^2-a-1}}$.

4. $2x-4+{\displaystyle \frac{5}{x+1}}$.

4 x 2 − 2 x +