Bonjour,
E=26-(-14+6-5) + (8 +7)
26 +14 -6 +5 +8 +7 =
(26+10+4) +(5+8 +7) -6=
40 + 20 -6=
60 -6 = 54
F= 10 - [8 - 17 +3 - (9 - 20)]
10- ( 8-17+3 -9 +20)=
10 -8+17 -3 +9 -20 =
(10+17+9) -( 8+3+20)=
36 - 31 = 5
G=12-(-8+4-7) - (9 +3-4)
12 - ( -11) -( 8)=
12 +11 -8 =
23-8 = 15
H=5 - 12- (5 - 11) - (7-14)
5-12 -5 +11 -7 +14=
(5+11+14) -( 5+12 +7)=
30 - 24 = 6