$\lim_{x\to-2}\left(\frac{\left(2+x\right)^2-4}{x}\right)$
$mx\left(2x-1\right)\left(2x+5\right)$
$4\left(8r-6\right)$
$\lim_{x\to\infty}\left(\frac{\cos\left(x\right)-1}{e^x-x-1}\right)$
$\frac{1}{1+\sqrt{a}}$
$\left(m^2+8\right)\left(m^2-2\right)$
$\left(-\infty^{\frac{2}{3}}\right)$
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