$28a^3-12a^2+16a$
$\left(+2\right)\cdot\left(+4\right)\cdot\left(-8\right)\cdot\left(+7\right)$
$\frac{v^2+4v-12}{v^2+10v-24}\cdot\frac{v^2+4v-12}{v^2-9}$
$a\left(a-b-c\right)$
$1-3+4-3-1+2$
$\left(b^2-2a\right)^7$
$4x+14=x+35$
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