$\frac{3x-4}{5}\cdot20$
$35x^2-8x-15$
$\frac{dy}{dx}=\frac{-xy}{y^2}$
$e^ty\frac{dy}{dt}=e^y+e^{-3t+y}$
$\cot\left(a\right)\tan\left(a\right)+\sec^2\left(a\right)$
$\left(\sqrt{x^2-5}\right)\cdot\left(\sqrt{x^2+5}\right)$
$3xa^2\:-\:4a^2x\:+\:10xa^2$
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