$-150x^2+1500x-2150=y$
$\frac{dy}{dx}=y^2\left(4y-y^2\right)$
$\frac{456}{-12}$
$\int\frac{\left(x+4\right)\left(x+2\right)}{x^2}dx$
$45a^2-81b^2$
$\:\left(5x+1\right)x\left(5x-1\right)$
$\frac{d^2}{dx^2}\left(4x^6\cdot sec\left(x\right)\right)$
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