102 - [3(2+7)+8] 102 - [3x2+3x7+8] 102 - [6+21+8] 102 - 35 67 now for the steps: 1)you always do multiplication first which was 3(2+7) ,which is 3x2+3x7 2)then add them which is 6 +21 3)add all of the three numbers 6+21+8 = 35 4)then you take out the brackets and subtract your numbers which is 102 - 35 = 67
