$4\left(x+2\right)-3\left(x-5\right)<2$
$m^2-4m+2$
$1-x-2x^2$
$121a^2-44ab+4b^2$
$\frac{\sqrt{y^2}-9}{2y}$
$\left(\frac{1}{x-1}-\frac{2}{x^2-1}\right)$
$-9\cdot23$
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