$\frac{dy}{dx}=\left(\frac{\left(xy\right)}{\left(x^2+1\right)^2}\right)$

$\frac{d^2}{dx^2}\left(2x^3+4x^2+\sin\left(x\right)\right)$

$\int x^2\:\arccos x\:dx$

$\lim_{x\to0}\left(\frac{\left(4ln\left(1-2x\right)+2x^3\right)}{5x^2+4x}\right)$

$-2-7\left\{4-5-6\left[5-7\cdot8\left(3-2-5\right)+56-25\right]+34-45\right\}-\left(2-8\right)$

$\frac{dy}{dx}\left(2e^{-x}+e^{3x}\right)$

$\int\left(3\sqrt{cot\left(x\right)}csc^2\left(x\right)\right)dx$