Решите 2*7^22-3*7^21/49^10

Question

Решите 2*7^22-3*7^21/49^10

Answer 1

(2*7^22-3*7^21)/49^10=7^21(2*7-3)/7^20=7*11=77

Answer 2

2*7^22-3*7^21/49^10= 7^21 × ( 2×7 - 3) / (7^2)^10 = 7^21 × 11 / 7^20 = 7 × 11 = 77