Помогите решить N5!!!

Question

Помогите решить N5!!!

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Answer 1

1) = (7^2)^5*7^12/(7^3)^7 = 7^10*7^12/7^21 = 7^10+12-21 = 7^1 = 7

2) = (4/7)^6*(7/4)^4 = (4/7)^6*(4/7)^-4 = (4/7)^6-4 = (4/7)^2 = 16/49