$\lim_{x\to-4}\left(\frac{x-4}{x^2-16}\right)$
$5\left(2\right)^6$
$\left|-3\right|\cdot\left|8\right|$
$81a^2-9b^2$
$\int_0^5\left(e\right)^{2x-1}dx$
$( 5 x + y ) ( 5 x - y )$
$\int\left(tan\left(w\right)sec^2\left(w\right)\right)dw$
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