exo1
A=5+(-5)-(-7)
=5-5+7
=0+7
=7
B= -16-(-4)-(+7)
= -16+4-7
= -19
C= 2+(-1)-(-5)
= 2-1+5
=1+5
=6
D= -10-(+4)-(-1)
= -10-4+1
=-14+1
= -13
exo2
E= 26--(-13)+(-1)
= 26+13-1
= 26+12
=38
F=10-[-6-(-11)]
= 10-(-6+11)
= 10-5
= 5
G=12--(-11)-8
= 12+11-8
=23-8
=15
H= -7-(-6)-(-7)
= -7+6+7
=6