$\frac{dy}{dx}=2\sec\left(2y\right)$
$15m^3-40m^2$
$x^2-2x\left(x-1\right)-1$
$3xy^{-3}\cdot y^5$
$8x^3-27y^6$
$\left(a^x\:-3\:\right)\left(a^x+8\right)$
$\frac{2x-3}{2}<3$
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