$$m m m$$
$m^{3}$
$$m^{1}m^{1}m^{1}$$
$$m^{1+1+1}$$
$$m^{2+1}$$
$$m^{3}$$
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$3m^{2}$
$$\frac{\mathrm{d}}{\mathrm{d}m}(m^{2}m)$$
$$\frac{\mathrm{d}}{\mathrm{d}m}(m^{3})$$
$$3m^{3-1}$$
$$3m^{2}$$