Преобразуй выражения

а) \((12-\sqrt{3})^{2}+12\sqrt{12}=\) [ ];

б) \((\sqrt{6}+2\sqrt{2})^{2}-2\sqrt{48}=\) [ ];

в) \((3\sqrt{5}+\sqrt{7})(\sqrt{7}-3\sqrt{5})=\) [ ];

г) \((5\sqrt{3}+6\sqrt{2})(6\sqrt{2}-5\sqrt{3})=\) [ ].