$\lim_{x\to\infty}\left(\frac{4x^3}{e^{4x}}\right)$
$\int\left(\frac{1}{1-\cos\left(x\right)}\right)dx$
$\lim_{x\to2}\left(36\right)$
$\left(2m^4n^{-1}p^{-2}\right)^4$
$\int\frac{-3}{\sqrt{x^2-6x+13}}dx$
$\left(3x^3+4ab^2\right)^2$
$\left(2x^{2\:}-x+2\right)$
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