$$25x^2-20x$$

$$y+xy^2-x\frac{dy}{dx}=0$$

$$\lim_{x\to0}\left(\frac{5\ln\left(x^2\right)}{x^2-1}\right)$$

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

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

$$5x-4\le3x+4$$

$$\frac{dy}{dx}\left(5^y=x^2+y\right)$$