$-31\:-3,09$
$( 5 x ^ { \frac { 1 } { 2 } } ) ^ { 2 }$
$\frac{1}{2-x}<3$
$\frac{-x}{-x}$
$\left(\frac{x}{2}+1\right)\left(\frac{x}{2}-1\right)$
$24x^2+16x^4+40x^3$
$2\cdot22\cdot6$
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