3×[15 - (2 - 3 + 5×3)] =[43×2 - ( - 3)×2 + 4]÷[( - 5 + 3) + (18 - 4)] = - ( - 7) + 14 - ( - 32 + 40) = - 3 + (6 - 8)×2 + 4 - 3×7 =20 - [4 + 2×5 - 14÷(12 - 5)] =?
3×[15 - (2 - 3 + 5×3)] = [43×2 - ( - 3)×2 + 4]÷[( - 5 + 3) + (18 - 4)] = - ( - 7) + 14 - ( - 32 + 40) = - 3 + (6 - 8)×2 + 4 - 3×7 = 20 - [4 + 2×5 - 14÷(12 - 5)] =.