Answer
$\frac{-14m^{8}}{n^{2}}$
Work Step by Step
$\frac{-14m^{6}n^{-4}}{m^{-2}n^{-2}}$
$-14\times m^{6+2}\times\frac{1}{n^{-2+4}}$
$-14\times m^{8}\times\frac{1}{n^{2}}$
$\frac{-14m^{8}}{n^{2}}$
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