$x^2-36\ge0$
$x^2-12x-864$
$\lim_{x\to0}\left(\frac{x-sin\left(x\right)}{x^2-x}\right)$
$2+3x\le5-x$
$\left(-\frac{1}{4}x^3\right):\left(-\frac{3}{4}x\right)$
$\left(x^2+1\right)\left(x^4+x^2+1\right)$
$17-5\cdot4$
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