3^16 : (3^5)^3 = 3^16 : 3^15 = 3^(16-15) = 3^1 = 3
(5^7)^3 : (5^4)^5 = 5^(73) : 5^(45) = 5^21 : 5^20 = 5^(21-20) = 5^1 = 5
6^8 (6^5)^4 : 6^25 = 6^8 6^(54) : 6^25 = 6^8 6^20 : 6^25 = 6^(8+20-25) = 6^3 = 216
49^2 : 7^3 = 7^4 : 7^3 = 7^(4-3) = 7^1 = 7
3^16 : (3^5)^3 = 3^16 : 3^15 = 3^(16-15) = 3^1 = 3
(5^7)^3 : (5^4)^5 = 5^(73) : 5^(45) = 5^21 : 5^20 = 5^(21-20) = 5^1 = 5
6^8 (6^5)^4 : 6^25 = 6^8 6^(54) : 6^25 = 6^8 6^20 : 6^25 = 6^(8+20-25) = 6^3 = 216
49^2 : 7^3 = 7^4 : 7^3 = 7^(4-3) = 7^1 = 7