Answer
$m^{11}$
Work Step by Step
$\frac{(m^{5})^{4}m}{m^{10}}=\frac{m^{5\times4}\times m}{m^{10}}=\frac{m^{20}\times m}{m^{10}}=\frac{m^{20+1}}{m^{10}}=\frac{m^{21}}{m^{10}}=m^{21-10}=m^{11}$
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