в) \(\frac{7^{11} \cdot 9^{11}}{63^{10}}\);

в) \(\frac{7^{11} \cdot 9^{11}}{63^{10}}\) = \(\frac{7^{11} \cdot 9^{11}}{(7 \cdot 9)^{10}}\) = \(\frac{7^{11} \cdot 9^{11}}{7^{10} \cdot 9^{10}}\) = \(7^{11-10} \cdot 9^{11-10}\) = \(7^1 \cdot 9^1\) = 7 \(\cdot\) 9 = 63

Ответ: 63