In the lesson Exponents of Powers , if the base is not the same then what do we have to do , like in the below questions:

1} 2^3 ? 4^5 =
2} 6^8 ? 9^8 =
3} 5^6 ? 7^3 =
4} 8^9 ? 3^9 =

Please can you write the answers step by step not write the direct answer.
It is not compulsory to solve all the questions.

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