\[ 3\sqrt{75}+\sqrt{75} = (3+1)\sqrt{75} = 4\sqrt{75} \]
\[ \sqrt{75}-\sqrt{3} = \sqrt{25 \times 3} - \sqrt{3} = 5\sqrt{3} - \sqrt{3} = (5-1)\sqrt{3} = 4\sqrt{3} \]
\[ \frac{4\sqrt{75}}{4\sqrt{3}} = \frac{\sqrt{75}}{\sqrt{3}} = \sqrt{\frac{75}{3}} = \sqrt{25} = 5 \]
Ответ: 5