$x^2+4x-5\le0$
$x^4\left(x+\frac{3}{x^2}\right)^5$
$\int_{-10}^0\frac{-8x}{\sqrt{2x+1}}\:dx$
$\frac{3x^2+7x-2}{x+3}$
$\lim_{x\to-0.99}\frac{1-\cos\left(-0.99\right)}{-0.99}$
$\frac{4.24}{3}$
$\lim_{x\to2}\left(\frac{2x}{\left(x-2\right)\left(x+2\right)}\right)$
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