$\int\frac{2x^2+5x-4}{x^3+x^2-2x}dx$
$\frac{3^{-6n}}{\left(9^{-n}\right)^3}$
$f^2cos^33x\:\frac{df}{dx}-sin3x=0$
$\lim_{x\to0}\left(\frac{1}{\sqrt{x-2}}\right)$
$\sin\left(3.13\right)$
$1,2x^2-0,3x+1$
$\int\frac{6x}{\left(x^2-1\right)^4}dx$
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