$\left(x\:+\:2y\right)\left(x\:-\:2y\right)\left(x^2\:+\:4y^2\right)\:$
$\lim_{x\to0}\left(\frac{\frac{1}{3}-\frac{1}{3}}{x}\right)$
$\tan\left(x\right)\csc\left(^2\right)x-\cot\left(x\right)\sec\left(^2\right)x$
$7\left(4b^2-2b-1\right)$
$\frac{cos\:5x+cos\:x}{sin\:5x-sin\:x}$
$3x-7\le2$
$\left(4x^3\right)\left(2x^2\:+\:5x^3\right)$
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