$\frac{1}{4}m^2nu^4-\frac{3}{4}mn^2u^3+\frac{5}{4}mn$

$\left(x+y-3\right)-\left(2x-y-5\right)$

$\left(5x^{\left(\frac{1}{3}\right)}\right)\left(2x^{\left(\frac{1}{2}\right)}\right)$

$\int\frac{x-14}{\left(x+4\right)\left(x-2\right)}dx$

$\frac{-56x^{12}y^8}{4x^5y^4}$

$\frac{d}{dx}\left(\frac{18}{x^2+5}\right)$