Question

10×{4^2×4^6×4^5-3×[7×7^4:7^3-(5^2)^5:5^8-3]}

Answer 1

10×{4^2×4^6:4^5-3×[7×7^4:7^3-(5^2)^5:5^8-3]}=

10×[4^8 : 4^5 - 3 × (7^5 : 7^3 - 5^10 : 5^8 - 3)] =

10 × [ 4^3 - 2 × ( 7^2 - 5^2 - 3)] =

10 × [4^3 - 2 × ( 49 - 25 - 3)] =

10 × ( 64 - 2 × 21) =

10 × ( 64 - 42) =

10 × 22 =

220
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