$\left(-10x^2-4x^2+5x-1\right)-\left(x^3-4x^2+x-1\right)$
$27+x=7$
$\frac{4x^5-2x^4-x^2+1}{2x^2-3}$
$\sqrt[2]{2^2-4x+x^2}$
$\frac{2x}{3}+2=4$
$\frac{3}{4}x-1\le\frac{1}{2}x+2$
$15\:cm\:5\:cm\:\sqrt{200}$
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