$\left(3x^2+2x\right)\left(3x^2-x\right)$
$2u^2+5u-18$
$3a\left(a-3\right)\left(a+3\right)$
$\int4x^{-1}dx$
$\frac{d}{dx}x^3\cos\left(x\right)-x^3\sin\left(x\right)$
$\left(\sqrt{30x}\right)\left(\sqrt{30x}\right)$
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