$2x^2-8x+8\le0$

$\left(16d-9\right)^2$

$\left(-7x-5\right)^2$

$\lim_{x\to0}\left(\frac{\sqrt{3}\left(\sin\left(x\right)-x\right)}{3x^3}\right)$

$\left(m^2-5\right)\left(m^2+5\right)$

$x\:\frac{dy}{dx}+xy\:=1-y\:\:,\:\:y\left(1\right)=0$

$\frac{dy}{dx}+\left(2x+\frac{1}{x}\right)y=e^{-x^2}$