CPM Homework Help : PC Problem 5-66

Rewrite each of the following expressions as simple fractions without negative exponents.

$\frac { x ^ { 2 } y ^ { 3 } + x ^ { - 2 } } { y ^ { - 3 } + x }$
Hint (a):
Multiply the fraction by: $\frac{x^{2}y^{3}}{x^{2}y^{3}}$

$\frac { x ^ { - 1 } + x ^ { 2 } } { x ^ { - 2 } + x }$
Hint (b):
Multiply by an appropriate fraction!