A = \dfrac{1}{5+2\sqrt{6}} - \dfrac{1}{5 -2\sqrt{6}}
B = \dfrac{1}{\sqrt{3} +2} - \dfrac{1}{\sqrt{3} - 2} + \dfrac{1}{3}\sqrt{243}
C = \dfrac{\sqrt{15} - \sqrt{12}}{\sqrt{5} -2} - \dfrac{1}{2 - \sqrt{3}}
D = \sqrt{6 + 2\sqrt{5}} - \dfrac{\sqrt{15} - \sqrt{3}}{\sqrt{3}}
E = \dfrac{\sqrt{10} -...