Answer:
{5 + [-5(2 - 4) : 2]}.4 = 40/ 1 = 40
Explanation:
Subtract: 2 - 4 = -2
Multiple: -5 * the result of step No. 1 = -5 * (-2) = 10
Divide: the result of step No. 2 : 2 = 10 : 2 = 5
Add: 5 + the result of step No. 3 = 5 + 5 = 10
Multiple: the result of step No. 4 * 4 = 10 * 4 = 40
i hope this helps :)