$\frac{x^{2}y}{x^{-6}y}$
$y^2+4y=0$
$\left(2x+\frac{1}{2}\right)\left(2x-\frac{1}{2}\right)$
$-12x+58=-7x+33$
$\sqrt[5]{\left(-3\right)}^{10}$
$4x^{4}+3x^{3}+2x^{2}-0x+1$
$\lim_{x\to0}\left(\frac{\cos\left(4x\right)-\cos\left(2x\right)}{x^2}\right)$
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