$\int\frac{2x^2-x-20}{x^2-x-6}dx$
$948-125$
$g+g+g+g$
$\left(4x^2-2y\right)\left(4x^2-5y\right)$
$\left(\sqrt{10}-3\right)\left(\sqrt{10}+3\right)$
$144-72x^2+9x^4$
$x4+36x^2+324$
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