$3x+4y+z=-2$
$x-1\le3x-5$
$\int5\sqrt{5x-2}dx$
$\frac{6\left(-\frac{16}{5}\right)-16}{5\left(-\frac{16}{5}\right)+16}$
$\left(x+20\:\right)\left(x-20\right)$
$y\frac{dy}{dx}+x=5$
$4x^2+2\le0$
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