$\lim_{x\to0}\left(\frac{x^2+tan^22x}{sin^22x}\right)$
$0,7-2,5$
$x^2-6x-48$
$x-3>2-x$
$11ax-121a^2x+33a^2$
$\ln\left(\frac{a}{10}\right)$
$\frac{4x^3-12x^2+8x}{2x^3}$
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