Answer
$\frac{1}{x^{10}z^{20}}$
Work Step by Step
$(\frac{x^{2}z}{z^{-3}})^{-5}$
$(\frac{x^{2}}{z^{-4}})^{-5}$
$(\frac{z^{-4}}{x^{2}})^{5}$
$\frac{z^{-20}}{x^{10}}$
$\frac{1}{x^{10}z^{20}}$
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