$\int\left(x^2-9x+7\right)\cdot e^{-x}dx$
$-15+200$
$\left(3m-18\right)\left(m-7\right)$
$36m^2-48mn+16n^2$
$\frac{\left(3x^4-12x^2+x-5\right)}{\left(x+2\right)}$
$7\left(2a^4-3a^3+5a^2\right)$
$40x+56$
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