7-(4-5(2-6)+2]+6 work within the inner parentheses, first
7- [4-5(-4)+2] + 6 perform the multipllcation in the parentheses
7-[4 + 20 + 2]+ 6 simplify within the parentheses
7-[26] + 6 perform any additions/subtractions from left to right
-19 + 6 =
-13