$4x^2+x-105$
$\frac{1}{y}y'\:=\ln\:\left(t\right)$
$x^2-16+63$
$\frac{d^2}{dx^2}\left(2\cdot\cos\left(\frac{1}{2}x\right)\right)$
$-11247-327-127$
$\lim_{x\to0}\left(\frac{1}{1-\cos\:\left(x\right)}\right)$
$2\left(k+7\right)$
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