$$\left. \begin{array} { l } { 3 a ^ { 2 } + 2 a - 8 } \\ { 2 m ^ { 2 } + 4 m - 6 m ^ { 3 } n } \end{array} \right.$$
$2m\left(3a-4\right)\left(a+2\right)\left(3nm^{2}-m-2\right)$
$$2m\left(3a-4\right)\left(a+2\right)\left(3nm^{2}-m-2\right)$$
$$-6a^{2}m^{2}-4am^{2}+16m^{2}-12ma^{2}-8am+32m+18na^{2}m^{3}+12anm^{3}-48nm^{3}$$
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$\left(3a-4\right)\left(a+2\right),\ 2m\left(m-3nm^{2}+2\right)$