$-\left(-5\right)\:-\:\left(-2\right)\:-1$

$\frac{dy}{dx}=-0.0000221867\sqrt{\left(y+1\right)}$

$196x^2y^4-225z^{10}$

$\frac{x^2-1}{x^2+2x-3}$

$\lim_{x\to1}\frac{\sin\left(x\right)}{5x+3\sin\left(x\right)\:}$

$\frac{\left(4x+7\right)}{5x+8}=\frac{\left(11\right)}{14}$

$9x^2-12x+4=0$