Answer
$$-32\ h^{15}k^{30}m^{10}
.$$
Work Step by Step
By raising each factor to the power and multiplying the exponents, we have
$$(-2h^3k^6m^2)^5=(-2)^5h^{15}k^{30}m^{10}= -32\ h^{15}k^{30}m^{10}
.$$
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