$\int_1^{\infty}\left(\frac{e}{x}\right)dx$
$\frac{\left(3x+1\right)^{x+1}}{2n+2}$
$x^2-x+12x+36$
$\lim_{x\to4}\left(\frac{3-x}{x^2-16}\right)$
$\ln\left(x-3\right)+\ln\left(x+1\right)=\ln\left(3\right)+\ln\left(x-1\right)$
$m^2+7m+49$
$\frac{21m^5n^6p}{-7m^3n^9z}$
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