$2x^2-3x^2+2x+5x+17$
$-5x+2\le2\cdot\left(x-5\right)$
$\frac{4x^3y^3}{8xy^{-5}}$
$y\:x\:2x\:^4y^2$
$n^2+11n$
$\frac{2x^4-4x^3+7x+9}{x^2-2x-1}$
$\frac{4}{x+2}\le-2$
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