$\sqrt{4+4x^2}$
$\frac{dy}{dx}+y=3x$
$14f+7+5f$
$\frac{2x^3-5x^2+x-2}{x-1}$
$\int_{lnx}^{e^x}\left(-16sint\right)dt$
$\sqrt[18]{18^9}$
$x^2+2x=80$
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