19-(4+7-6-11+1) =
24-(3-10+7)-(-8-3) =
13-(2-1)+(9-19)-(+5-2) =
15+[-14-(7-6+3)]+2 =
-[10+3-(2-5)]-7+(4+6) =
7-3-[(8-10)-(-6+1)]=
(4-8)-[5-(10+2)-4]=
-[100-(-105+110)]-[120-115)-125]=
13+[16-(-8+7)]-(-2-5) =