$\left(\frac{2}{5}m^2n-\frac{1}{4}m^3n^3o^2\right)^2$

$7\left(-10\right)\left(2\right)\:$

$\int_0^{\infty}\frac{49\cdot\cos\left(x\right)}{-40\cdot x}dx$

$\frac{x^2-x-160}{x^2-25}$

$\frac{dz}{dx}\:x^2-2yz^2$

$\frac{dy}{dx}=\frac{x}{9y}$