Answer
Does not make sense.
Work Step by Step
$\Rightarrow \frac{1-x^{-2}}{1-5x^{-3}}$
Use the negative-exponent rule $b^{-n}=\frac{1}{b^n}$.
$\Rightarrow \frac{1-\frac{1}{x^{2}}}{1-5\cdot\frac{1}{x^{3}}}$
Simplify.
$\Rightarrow \frac{1-\frac{1}{x^{2}}}{1-\frac{5}{x^{3}}}$.
Hence, the statement does not make sense.
