$5n+15=-60$

$\left(x-3\right)^2+\left(x-1\right)^2>20$

$\frac{5x^2+8x+8}{\left(x+2\right)\left(x^2+2x+6\right)}$

$\lim_{y\to2}\left(\frac{1-x}{2-x}-\frac{2x}{x^2-4}\right)$

$2\frac{\sqrt{6}}{\sqrt{3}}$

$\text{large}\:\left(z+2\right)^2$

$\:\:\:\:\:\:\:\:\:\:\:9\:=\:16\:+\:b^2\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$