$\lim_{x\to\infty}\left(x^2\left(1-cos\left(\frac{2}{x}\right)\right)\right)$
$\left(-2\right)\left(0\right)-2$
$\sqrt{16-4sinx^2}$
$\left(\frac{1}{5}x\:y^2\:+\:\frac{1}{6}\:x^2\:y\right)^2$
$4n^2+4n-3$
$10x\:-\:3y\:+\:9z\:=\:1$
$\lim_{x\to\infty}\left(\frac{\left(2x^2-6x-8\right)}{6}\right)$
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