Answer
$\frac{5}{z^{7}}$
Work Step by Step
Step 1: $5z^{-7}$
Step 2: $5^{1}(\frac{1}{z^{7}})$
Step 3: $\frac{5\times1}{z^{7}}$
Step 4: $\frac{5}{z^{7}}$
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