$\frac{d}{dx}3x^2-xy^2+y^{-1}$
$\left[40:\left(-4\right)\right]:2$
$3e^3+25e^2+36e+36$
$\frac{2}{3}x+\frac{1}{2}=\frac{31}{6}$
$x9+5-2$
$\int_0^{5\frac{\pi}{2}}\sqrt{9-9\cos^2\left(x\right)}dx$
$\lim_{x\to\infty}\left(\sqrt{x+2\sqrt{x}}-\sqrt{x}\right)$
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