$\lim_{x\to1}\left(\frac{2+x-2x^3-x^4}{x-1}\right)$
$\lim_{x\to0}\left(\frac{tan^2\left(4x\right)}{sin^2\left(3x\right)cos^2\left(2x\right)}\right)$
$\sqrt[3]{-27x^{-22}}y^{21}$
$-4+\left(-6\right)-\left(7\right)+1-4$
$1,80-1,42-1,39$
$\frac{x^2}{x+3}\ge2$
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