Explanation:
45⁴⁵ 15¹⁵
(3²·5)⁴⁵ (3·5)¹⁵
(3⁹⁰ 5⁴⁵) (3¹⁵ 5¹⁵)
3¹⁰⁵ 5⁶⁰
3⁷⁵ 3³⁰ 5⁶⁰
3⁷⁵ (3·5²)³⁰
3⁷⁵ 75³⁰
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