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7la puterea 13 la puterea 2 :(7la puterea 42)la puterea 4

Răspuns :

7^13^2 : (7^42)^4 =

= 7 ^13×13 : 7^42×4 =

= 7^169 : 7^168 =

= 7^169 - 168 =

= 7^1 =

= 7