$\lim_{x\to0}\left(\frac{2sin-0.1}{-0.1}\right)$
$\frac{5}{x-4}>2$
$240+60-70$
$\lim\:_{x\to\:\:27}\left(\frac{x-27}{\sqrt[3]{x}-3}\right)$
$2x^3\left(3x^2+5x-1\right)$
$2x^2+4x-16=0$
$3.4a^4\:b^3-5.6a^4\:b^3$
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