$\frac{d}{dx}x^2+2xy-y^2+x$
$\cot^2\left(x\right)-\cot\left(x\right)=0$
$( 2 ^ { 8 } ) ^ { 2 }$
$\frac{2g-3}{2g}$
$\frac{dy}{dx}=2x^2+2y+1$
$\ln\frac{3}{x}\:=2$
$\left(7-5x\right)\left(49+35x+25x^2\right)$
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