$$\left. \begin{array} { l } { 7 m } \\ { 7 m } \\ { 8 x + 7 m } \\ { 8 x + 7 m + 5 x 5 x } \end{array} \right.$$
$7m\left(8x+7m\right)\left(5xx_{5}+8x+7m\right)$
$$7m\left(8x+7m\right)\left(5xx_{5}+8x+7m\right)$$
$$448mx^{2}+245xx_{5}m^{2}+784xm^{2}+280mx_{5}x^{2}+343m^{3}$$
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$7m,\ 7m,\ 8x+7m,\ 5xx_{5}+8x+7m$
