$\lim_{x\to\infty}\left(cos\left(\frac{1}{x}\right)\right)$
$4^2-7-\left(-7\right)^2$
$\left(-220\right)+\left(-9\right)$
$-8\:x\:3$
$\left(-3mn^2x^2\right)^2$
$3x-2>x+5$
$7a-7a^2+4a+4a^2$
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