$\left(x^2-12\right)\left(x^2-3\right)$
$\int_1^{\infty}\left(e^{-st}\left(t\right)\right)dt$
$\left(o.4a-5b\right)\left(0.4a+5b\right)$
$132\::\:\left(-3\right)$
$x+5=2x-4$
$4\cdot x^4+4\cdot x^3-3\cdot x^2-2\cdot x+1$
$x^2-10x-40$
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