$\int_2^5e^{-x}dx$
$x^2y^2-xy^2+3y^2$
$\frac{3}{x+1}=\frac{2}{x+3}$
$-11+x\le-6$
$\frac{60x^{7\:}b^2}{-45x^2b^7}$
$\left(x^2+2y^3\right)^5$
$5\left(2+7\right)$
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