$\frac{x}{x-2}-\frac{x}{x+2}-\frac{8}{x^2-4}$
$\lim_{x\to4}\left(x^{2}\right)$
$\int64e^{4x}\cdot sin\left(4x\right)dx$
$\left(5x^3\:+\:4^2\right)$
$2-2n=3n+17$
$a^2b+2ab-b$
$3x+5\ge7$
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