$20x^2+29x+90$
$\int x\sec^2\left(9x^2+\frac{1}{7}\right)dx$
$-4n+7n$
$6d-5c-d$
$\frac{d}{dx}\sqrt{x-2}+1$
$4x^2\:+\:48y\:+\:12x\:-\:159\:=\:0\:$
$\left(62.4\:\right)\int_0^4\left(10-x\right)\:\left(\sqrt{16-x^2}\right)dx$
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