$x^2+2x+5\le0$
$\log\:_{49}\left(\left(m+4\right)\left(m-2\right)\right)=\frac{1}{2}$
$\frac{1}{8}x-\frac{3}{6}x+\frac{5}{8}x$
$8-\left(2-7-14\right)\cdot3+4\cdot6-25$
$\lim_{x\to3}\frac{x^2-11x+24}{x^2-6x+9}$
$\left(m+n+w\right)-\left(2m-3n-4w\right)$
$\frac{x^4+x^2-3x+2}{x-2}$
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