simply : (5/7)^-7 × (8/5)^-5
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Step-by-step explanation:
(5/7)^-7 x (8/5)^5^8/-8
(7/5)^7x (5/8)^8
7^7/5^7 x (5^7x5/ 8^8)
7^7x5/8^8
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