(((5/7)^2)^-1)^-3) simply and write in exponential form with positive exponent. Step by step answer please.
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==: (((5/7) ^ 2) ^ -1) ^ -3)
==: (5/7) ^ 2 * -1 * -3
==: (5/7) ^ 6
==: 15625 / 117649
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