$2-2cos^2\left(x\right)=sin^2\left(x\right)$
$x=3y$
$\left(-4\right)\left(-4\right)+11+3-8$
$\lim_{x\to0}\left(\frac{e^{2x}}{3x-1}\right)$
$\left(2x-y\right)\left(2x+\right)\left(2x\right)$
$3\cdot3^2\cdot3$
$\left(\frac{\sqrt[3]{x}}{y}-\frac{x}{2}\right)\left(\frac{\sqrt[3]{x}}{y}+\frac{x}{2}\right)$
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