$\frac{88}{-4}$
$3\left(\tan^2-\tan^2\right)$
$\left(k-10\right)\left(k+7\right)$
$\left(\:30\right)\left(-6\right)\:$
$395-0.636$
$0.2x-0.1>0.3$
$e^{-y}cosx-\frac{dy}{dx}=0$
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