81 elevado a menos 5 sobre 9 elevado a menos 11
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81^-5/9^-11
(1/81^5)/(1/9^11)
(1/(9^2)^5)/(1/9^11)
(1/(9^10)/(1/9^11)
(1/(9^10)*(9^11/1)
9^11/9^10
9^(11 - 10)
9^1
9
(1/81^5)/(1/9^11)
(1/(9^2)^5)/(1/9^11)
(1/(9^10)/(1/9^11)
(1/(9^10)*(9^11/1)
9^11/9^10
9^(11 - 10)
9^1
9
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