$-\frac{1}{4}x-\frac{1}{2}x^2+2x^3$
$\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}}sin^2x\:cos^4xdx$
$\left(h-9\right)\left(h+9\right)$
$3a^2-10a+3$
$4am^3-12amn-m^2+3n$
$49x^2-y^2$
$-4\left(x-3\right)+\frac{1}{3}$
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