$\lim_{x\to1}\left(\frac{1}{\ln\left(x\right)}-\frac{1}{x}\right)$
$1-1+\left(-76+65-\left(-3\right)-4\right)$
$-5\:x\:\left(-3\right)\:+\:3$
$\left(-0.5\right)\left(-2\right)\left(-8\right)$
$3\cdot\sqrt{2}-5\sqrt{32}+7\cdot\sqrt{8}-9\cdot\sqrt{50}$
$216x^3+125$
$\left(2k^2+4y^2\right)\left(4y^2x-2k^2\right)$
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