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(49+7la puterea 57:7la puterea55 )

Răspuns :

49 + 7^57 : 7^55 = 49 + 7^2 = 49 + 49 = 98 
49 + 7^57 ÷ 7^55 =
= 49 + 7^2
= 49 + 49
= 98