$\frac{\cot^2\left(y\right)-1}{\csc^2\left(y\right)}=\cos2\left(y\right)$
$z'\:=\:z$
$\left(2a+4b^3\right)$
$4d^2-4d+1$
$d+7d+-10d^2$
$\frac{dy}{dx}\left(5x-6=xy\right)$
$\frac{m^6-2^6}{m-2}$
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