$\left(5mn\right)\left(-3mn2\right)\left(4m^{2}n\right)$

$6m^2-2n$

$\lim_{x\to5}\left(\frac{1-\cos\left(x-5\right)}{ln^2\left(x-4\right)}\right)$

$\int\left(x^2\left(x^3-6\right)^{18}\right)dx$

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

$5x^2y\:de\:12x^2y$

$x y - y - 11 x = 5$