Mark solved the problem incorrectly. 180 - 9 x 4^2 + 7 Step 1 180 - 9 x 8 + 7 Step 3 108 + 7 Step 2 180 - 72 + 7 115 What was Mark's mistake? *

he just did step 3 before step 2 or atleast thats how u worded it