Question

-7{-2-4[-3(4-10)-(7-12)+3(5-4)]-2[4(8-3)-20]} -3

Answer 1

-7{-2-4[-3(-6)-(-5)+3(1)]-2 [4(5)-20]}-3
-7{-2-4[18+5+3]-2 [0]}-3
-7{-2-4[26]}-3
-7{-2-[104]}-3
-7{-106}-3
742-3
739

Answer 2

-7 {-2-4[-3( -6)-(-5) +3 (+1) ] -2 [ 4( +5) -20]}-3
-7 {-2-4[18+5+3]-2[20-20]}-3
-7{-2 -4[26]-2[0]}-3
-7{-2-104]}-3
-7{-106}-3
-7{-106}-3
742-3
739