$x^{-\frac{3}{2}}+2x^{-\frac{1}{2}}+x^{\frac{1}{2}}$
$-0,23+0,8$
$\frac{8}{-4}-\left(-5-3\right)+3.\left(15-17\right)$
$\left(5x^2-9y^6\right)^2$
$xdy-\frac{1}{3}ydx=0$
$\frac{d}{dx}xy=e^{2y}$
$\left(a\:-\:1\right)\left(a^n\:+\:a^{n+1}\:+\:a^{n+2}\right)$
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