Answer
$m^{6}p^{5}/n^{4}$.
Work Step by Step
$m^{4}n^{3}p^{-3}/m^{-2}n^{7}p^{-8}$
$m^{4}n^{3}*m^{2}p^{8}/p^{3}*n^{7}$ (since $a^{-1} = 1/a$)
$m^{6}p^{5}/n^{4}$. (since $a^{3}/a^{2}=a^{(3-2)}$ and $a^{3}*a^{2}=a^{(3+2)}$)
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