$4cos2x-3=0$
$13\sqrt{x}-\sqrt{100x}$
$1,43\:-\:2,56$
$\lim_{x\to0}\left(\frac{4x^2}{1-cos2x}\right)$
$\left(\sqrt{3}\right)^4\left(\sqrt{3}\right)^{-2}$
$10+4x=4+10x$
$\int-9\:dx$
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