$\cot^2\left(x\right)-\sqrt{3}\cot\left(x\right)=0$
$-4.3+-6.5-8m+7.3$
$-12\left(-50\right)$
$\left(6z+x^3\right)\cdot\left(6z-x^3\right)$
$\left(3x-y\right)+\left(x+3y\right)+\left(5y-2x\right)+\left(2x+y\right)$
$\lim_{x\to\infty}\left(x^2+3x-x\right)$
$\pi\left(2-3\pi-\sqrt{11}\right)$
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