Question 279573
(2s^-1t^3)^-3/(6s^2t^-4)^-3}
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(6s^2t^-4)^3)/(2s^-1t^3)^3
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[(6s^2t^-4)/(2s^-1t^3)]^3
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(3s^3/t^7)^3
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= (27s^9/t^21)
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Cheers,
Stan H.