$-4x^2-3x+1$
$2\cot x^2-\cot x-5$
$x\frac{dy}{dx}-y+x=0$
$7x^2y\:+\:xy^2\:$
$x\frac{35}{\tan\left(68\right)}$
$\sec\left(a\right)\cot\left(a\right)=\csc\left(a\right)$
$3xdx=ydy$
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