2×3^2-81^10:27^5:[5^3-5×(4^2-11)^2+3^5]^5 =
=2×3^2-3^40:3^15:[5^3-5×(16-11)^2+3^5]^5 =
=2×3^2-3^25:[5^3-5×5^2+3^5]^5 =
=2×3^2-3^25:[5^3-5^3+3^5]^5 =
=2×3^2-3^25:(3^5)^5 =
=2×3^2-3^25:3^25 =
=2×9-1 =17
125^5:25^7+3×[16^3×4^2:8^5+(7^5×3^4)^10:(7^2)^25×9^20] =
=5^15:5^14+3×[2^12×2^4:2^15+(7^50×3^40):(7^50×3^40] =
=5+3×(2^16:2^15+1) =
=5+3×(2^1+1) =
=5+3×3 =14