$\lim_{x\to-3}\left(\sqrt{\frac{x^2-9}{x+3}}\right)$

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

$\frac{x}{6}+21<\frac{x}{7}+22$

$\sin\left(x\right)=-0.5548$

$\sqrt{16n^2+2n+1}-\sqrt{4n}$

$2x-6+\left(-5\right)$

$log\left(log\left(2x+3\right)\right)-\left(log\left(log\left(x-5\right)\right)\right)$