2^3×2^5 = 2^(3+5) = 2^8

7^15÷7^13 = 7^(15-13) = 7^2

4^14×4^18÷4^27 = 4^(14+18-27) = 4^5

11^25×11^28×11^4 = 11^(25+28+4) = 11^57

8^47÷8^24÷8^21 = 8^(47-24-21) = 8^2

455^3÷91^3 = (5713)^3/(713)^3 = (5^37^313^3)/(7^313^3) = 5^3 = 125

(5^13)^6÷(6^12)^7 = 5^(136)÷6^(127) = 5^78÷6^84

9^14÷3^25 = (3^2)^14÷3^25 = 3^28÷3^25 = 3^3 = 27

27^15÷9^22 = (3^3)^15÷(3^2)^22 = 3^45÷3^44 = 3^1 = 3