$\lim_{x\to a}\left(\frac{e^x-e^a}{x-a}\right)$
$\left(4m^2-6x^2\right)^3$
$-7\cdot25$
$8 x ^ { 3 } + 6 x$
$\int_4^{\infty}\left(\frac{1}{x^2-x-6}\right)dx$
$csc^2x\:=\:2.5$
$-4\left(-1\right)^2\:\left(2\right)+2\left(-1\right)\left(2\right)^2\:+3$
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