Answer
72$m^{11}$
Work Step by Step
(-3$m^{4}$)(6$m^{2}$)(-4$m^{5}$) = (-3)(6)(-4)($m^{4}$$m^{2}$$m^{5}$) = 72$m^{4 + 2 + 5}$ = 72$m^{11}$
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