$\left(64+12\right)+\left(243-128\right)$
$4x^2-12xy^3+9y^6$
$\frac{3x^3-10x^2+2}{x^2-2x}$
$25x\:2\:+\:10x+\:1+1$
$\lim_{x\to\frac{\pi}{2}}\left(x-\frac{\pi}{2}\right)\cot\left(x\right)$
$\left(1.5x^2-4y\right)\cdot\left(1.5x^2-4y\right)$
$\frac{x+3}{3x-2}\le2$
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