$\frac{dz}{dc}=z-z^2$
$1-2ab-\left(a^2+b^2\right)$
$\left(+816\right)-\left(+421\right)$
$\int x\arccot\left(5x\right)dx$
$\left(2mn^2+y\right)^5$
$3x\:2\:+8x+5$
$\frac{d^2}{dx^2}\left(2inx\right)$
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