CPM Homework Help : PC3 Problem 11-133

Rewrite each of the following expressions as a fraction without negative exponents.

$\frac { x ^ { 2 } y ^ { 3 } + x ^ { - 2 } } { y ^ { - 3 } + x }$
Hint (a):
Multiply by a Giant One of: $\frac{x^{2}y^{3}}{x^{2}y^{3}}$

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