$\frac{3x^2+4x+5}{x+5}$
$-8x+x+x-6x$
$\int\frac{\left(30x^2-20\right)}{2x^3-4x-9}dx$
$\sqrt{3^2.}$
$-\frac{7}{1}$
$\lim_{x\to1}\left(\frac{cos\left(3x\right)-1}{x^2}\right)$
$-41\:+\:22,1$
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