Question

Calculati: 7^2+7^3•[(7^4)^9:7^34+7•7^27:7^26]:49^2

Answer 1

7^2+7^3×[(7^4)^9:7^34+7×7^27:7^26]:49^2=
= 7^2 + 7^3 x (7^36:7^34 + 7x7) : (7^2)^2 =
= 7^2 + 7^3 x (7^2 + 7^2) : 7^4 =
= 7^2 + 7^3 x 2 x 7^2 : 7^4 =
= 7^2 + 2 x 7^5 : 7^4 =
= 7^2 + 2 x 7 =
= 49 + 14 =
= 63