Для решения используем свойства степеней:
1) 3^16 : (3^5)^3 = 3^16 : 3^(5*3) = 3^16 : 3^15 = 3^(16-15) = 3^1 = 3
2) (5^7)^3 : (5^4)^5 = 5^(7*3) : 5^(4*5) = 5^21 : 5^20 = 5^(21-20) = 5^1 = 5
3) 6^8 * (6^5)^4 : 6^25 = 6^8 * 6^(5*4) : 6^25 = 6^8 * 6^20 : 6^25 = 6^(8+20-25) = 6^3 = 216
4) 49^2 : 7^3 = (7^2)^2 : 7^3 = 7^4 : 7^3 = 7^(4-3) = 7^1 = 7
5) 8^14 * (8^4)^6 / (8^5)^7 * 8 = 8^14 * 8^24 / 8^35 * 8 = 8^(14+24-35+1) = 8^4 = 4096
6) 9^5 * 81^6 / 3^30 = (3^2)^5 * (3^4)^6 / 3^30 = 3^10 * 3^24 / 3^30 = 3^(10+24-30) = 3^4 = 81
Ответ: 1) 3, 2) 5, 3) 216, 4) 7, 5) 4096, 6) 81