$2\cdot2048$
$\left(t-5\right)\left(2t+7\right)$
$4x-14+9x-63$
$\left(9-5\right)\left(8-4\right)$
$\frac{dy}{dx}=x-y,\:y\left(0\right)=1$
$\csc\left(2a\right)+\cot\left(4a\right)+\csc\left(4a\right)=\cot\left(a\right)$
$2xy'+\frac{x^2}{y+1}=0$
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