$25m^2-n^2$

$\left[\left[\frac{\left(-2\right)^4}{\left(-5\right)^4}\frac{\left(-5\right)^4}{\left(-2\right)^4}\right]^4\right]^5$

$\lim_{n\to\infty}\left(11.125\right)$

$7v\cdot3v^2\cdot6v^2$

$2x+5\cdot2x-5-2x-1^2$

$\frac{dy}{dx}=-\frac{\sin\left(x+5\right)}{y}\:$

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