$\frac{d}{dx}2+\left(x+1+y^2+y\right)\left(x+1\right)^{-1}=x^2+2y$
$\left(\sec\left(x\right)^2+1\right)\left(\sec\left(x\right)^2-1\right)$
$\left(2a^2\right)\left(2a^5\right)$
$-2\:-35\:+\:3\:-7\:-\:2$
$82.3-4.63$
$\int\frac{e^x}{e^{2x}-4}dx$
$a^6-3a^4+8a^3-4a^3$
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