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Calcula la suma de cifras de resultado de la siguiente operación​

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447 cents MercierDo
Answer:

765

6² = 36

66² = 4356

666² = 443556

6666² = 44435556

(666...66)² = 44...4 + 3 + 55...5 + 6    

                       84               84  veces

4(84) + 3 + 5(84) + 6 = 765

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