$x^2\left(9x^2\right)$
$x^3-x^2-9x-6$
$16x^2+192x+576$
$\left(n+2\right)\left(a-b\right)$
$\int\sec^22x\:\cos^2\:2x\:dx$
$\frac{x^3+27}{x^2-3x+9}$
$-12\left(-3\right)+4$
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