$\left(x^4-3x\right)\left(x^4+2\right)$
$\lim_{x\to-4}\left(\frac{20}{\sqrt{5x+1}-1}\right)$
$4-\left(9-2\right)^2$
$\left(32\right)-\left(-8\right)+\left(-15\right)-\left(-53\right)+\left(-29\right)$
$y=\frac{1}{2}x^2+3$
$\left(y^2-1\right)\left(y^2-3\right)$
$\sqrt{\left(2mx^{3m-3}+3mx^{2m+2}\right)}$
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