$5+3x\:-7-2$
$2\csc^2x+cotx=5$
$\lim_{x\to0}\left(\frac{3x^3-6x}{7x^3+7}\right)$
$\left(2+\left(6-10\right)\right)-\left(7-14\right)$
$x^2-x+7$
$\left(-1.2\right)\left(-3.5\right)\left(2.7\right)\left(-0.8\right)$
$\frac{x^2+2x}{x^2-6x+9}$
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