$4\cdot2\cdot2$
$\left(x^k+2\right)\left(x^k-6\right)$
$16+8x^2+x^4$
$3+\sqrt{3\left(8\right)+1}$
$\lim_{x\to2}\left(\frac{x^2-2x}{x^2-2}\right)$
$x^2-2x-80=0$
$\int\left(x^5\sqrt[4]{x^6+2}\right)dx$
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