$2x^2\left(x^3+5x\right)$

$\frac{2}{99}m^2n^3-\frac{8}{11}mn^3$

$\int\frac{3x}{\sqrt{2-x^2}}dx$

$\int e^{-3}dx$

$\lim_{x\to5}\left(\frac{e^{x-5}-e^{5-x}}{se\left(x-5\right)}\right)$

$\frac{\csc\left(x\right)^2-\sin\left(x\right)^2}{\csc\left(x\right)+\sin\left(x\right)}$

$\frac{dy}{dx}=xy+3x$