$7x+13x^2+115x+12$
$\left(a^9x^5+b^3\right)\left(a^9x^5+7b^3\right)$
$\int\frac{y^3}{\left(1-2y^2\right)^5}dy$
$x^2+9x-10$
$\left(\frac{1}{x}+z\right)\left(-\frac{1}{x^2}\right)$
$\left(-2x-y\right)^7$
$4x^3+2x-10$
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