$\frac{df}{dx}=\frac{8}{x^5}+5\:3^x+5\cos\left(x\right)$
$\frac{d}{dx}x^2=4py$
$\left(1\right)\left(x+2\right)^2$
$-n^3-125$
$x^2+15x+50$
$-3\left(r-7\right)-2$
$48x^7-3x^3$
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