$-x^2+x+6>0$
$\lim_{x\to\infty}\frac{20+40x^2+x^4}{20+80x+4x^2}$
$4x-3<2x+7$
$\frac{1}{3}-\frac{23}{3}-\frac{17}{3}$
$x^2-2x-24>0$
$4\left(3\right)^2-\left(4\right)^2$
$-49-26-33$
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