$\lim_{x\to\infty}\left(\left(\frac{x^2+1}{x+2}\right)^{\frac{1}{x}}\right)$
$\sqrt[3]{\frac{\sqrt{3}+i}{-1+i}^2}$
$\tan\left(20\right)=\frac{\sin\left(20\right)}{1+\cos\left(20\right)}$
$\left(-2\right)\cdot\left(+7\right)-\left|\left(-2\right)+\left(-8\right)-\left(-4\right)\right|\cdot\left(-3\right)$
$x^2+6xy+5x^2$
$512m^6x^{15}-729y^9z^{21}$
$\left(x+3\right)\left(x-3\right)+\left(x+y-2\right)^2-\left(y-2\right)\left(y-6\right)$
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