[tex]\\ \bull\tt\longmapsto \sqrt{7}+\sqrt{7}=2\sqrt{7}[/tex]
[tex]\\ \bull\tt\longmapsto 6\sqrt{7}-11\sqrt{7}+2\sqrt{7}=-3\sqrt{7}[/tex]
[tex]\\ \bull\tt\longmapsto \sqrt{96}+6\sqrt{72}=4\sqrt{6}+6\sqrt{72}[/tex]
[tex]\\ \bull\tt\longmapsto \sqrt{B}-5\sqrt{B}=-4\sqrt{B}[/tex]
[tex]\\ \bull\tt\longmapsto -2\sqrt{32}-7\sqrt{8}=-4\sqrt{8}-7\sqrt{8}=-11\sqrt{8}[/tex]
