$\frac{dy}{dx}=\frac{x-y}{2x}$

$\frac{1}{2}x^2-\frac{5}{2}x+1=0$

$\left(\frac{z^2\:}{\:5^4}\right)^4$

$\frac{2y^2-1}{y^4}y'=\frac{x-1}{x^2}$

$\int\left(6x^3-9x^2+7x-2\right)dx$

$\lim_{x\to1}\left(\frac{\sin\left(5x\right)}{x}\right)$

$\left(d+1\right)\left(d-2\right)y=\cos\left(\frac{x}{2}\right)$