14) \(2\sqrt{48}+2\sqrt{3}-2\sqrt{75}\)

Упростим корни: \(\sqrt{48}=4\sqrt{3}\), \(\sqrt{75}=5\sqrt{3}\).

\(2\cdot4\sqrt{3}+2\sqrt{3}-2\cdot5\sqrt{3}=8\sqrt{3}+2\sqrt{3}-10\sqrt{3}=0\).

Ответ: 0.