$\int e^{2-x}dx$
$c^7d^8+c^2d^4$
$172\cdot7$
$xcosy\frac{dy}{dx}-siny=0$
$\left(\frac{1}{2x^2}+4\right)\left(x^3+2\right)$
$\frac{1}{x}+\frac{7}{2x}=\frac{3}{2}\:$
$x^2-2x^2-2$
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