$\lim_{x\to-\infty}x^5-5x^3-5x^2+10$
$\lim_{x\to2}\left(2x^2-3x+6\right)$
$\sec\left(x\right)^2-cot\left(x\right)^2$
$\int_3^7\frac{x}{x^2+6x+13}dx$
$\sqrt{3}cot3x\:+1\:=0$
$a^2-6a+6$
$\left(4d+3x\right)^3$
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