$3x^2y-6xy^2+12x\left(-6x^2+3x+1\right)$
$x3+27$
$-x^2\leq 0$
$\left(3w\right)\left(w+4\right)\left(w-2\right)\left(w+2\right)$
$4x^2+x-14$
$\left(x+5\right)\left(x-3\right)=x^2+2x+15$
$1x+1$
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