Ответ:\((\sqrt{7})^2=7\).\(\sqrt{(-5)^2}=|-5|=5\).\(\sqrt{\frac{25}{49}}=\frac{\sqrt{25}}{\sqrt{49}}=\frac{5}{7}\).\(\sqrt{36\cdot64}=\sqrt{36}\cdot\sqrt{64}=6\cdot8=48\).Ответ: 7; 5; \(\frac{5}{7}\); 48.