$\left(4x^3-8x\right)^2$
$2x-x^2=0$
$\lim_{x\to0}\left(\frac{x}{x-2\sqrt{x}}\right)$
$\sqrt{9}+5^2$
$18xy-9wy-12y$
$\int\left(3x^2-5\right)^44xdx$
$\left(\frac{1-\cos\left(2x\right)}{1+\cos\left(2x\right)}\right)\cdot\frac{1-\cos\left(2x\right)}{2}$
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