Cube Roots of Compound Expressions.

1 − 1 2 x + 1 .

6. $5x+4+{\displaystyle \frac{x+7}{x^2+x-1}}$.

7. $a+{\displaystyle \frac{5a-2}{a^2+a+2}}$.

8. $y^2-yx+x^2$.

9. $x^2-4x+3+{\displaystyle \frac{2x-4}{x^2+x+1}}$.

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

[2]Exercise44.

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

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