(3+5)-4+3+(4-(-5))
(4+5)-5+6+7(-8-9)-(-8+9)=
(8+9)-5+5(6+7)+5
(9-8)+6(-6-8)+3-5+(6-8)
(5+9)+4-5(6+7)-6=
11
30
35
-1
16
