$-3x^2+2-7x$
$x^4+2x^3+2x^2$
$\frac{1+\tan\left(x\right)}{\sin\left(x\right)+\cos\left(x\right)}$
$-3m^2+m^4+9$
$\int\frac{3x+4}{x^2+x-6}dx$
$-7\left(-5m-9\right)+4$
$\left(-6x^2y^6\right)\left(3x\:y^{10}+7x^7y^8\right)$
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