$x^2ex$
$tg\:x=-35$
$-25\cdot11$
$\lim_{x\to4}\left(\frac{x^4-4x^3+4x^2}{x-2}\right)$
$\frac{4x}{\left(x-8\right)^2\left(x^2+4\right)x}$
$\int x^2\sqrt{1+4x^2}dx$
$-8\left(\frac{1}{4}\right)+3\left(\frac{1}{3}\right)$
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