$8x^2-48x+20$
$8y=48$
$-ax^2-a^2$
$\left(20y\right)\left(+7\right)$
$\frac{dy}{dx}\left(yarctan\left(\frac{x}{2}\right)+arctan\left(\frac{2}{x}\right)\right)$
$-1\left(-29\right)$
$\left(5a+2b\right).\left(5a-2b\right)$
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