$2-\left[-2\left(x+1\right)-\frac{x-3}{2}\right]\le\frac{2x}{3}-\frac{5x}{12}+3x$
$\sqrt[4]{81x^8}$
$\left(\frac{1}{2}y^2-\frac{1}{2}y^{-2}\right)^2$
$\frac{x^5+x^2-3}{x^2-x+1}$
$3+0\cdot5$
$\frac { 4 } { 5 } y \frac { 2 } { 10 }$
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