[tex]\left.\begin{cases} (2=\sqrt{4}) < \sqrt{7}\\ \sqrt{3} <\sqrt{48}\end{cases}\right| \Rightarrow 2+\sqrt{3} < \sqrt{7}+\sqrt{48}[/tex]
[tex]\left.\begin{cases} (3=\sqrt{9}) < \sqrt{11}\\ \sqrt{2} <\sqrt{72}\end{cases}\right| \Rightarrow 3+\sqrt{2} <\sqrt{11}+\sqrt{72}[/tex]
