Bonsoir,
A= 14+11 = 25
B= -10 + 12 = 2
C= -3* -4 = 12
D= -7 +4 = -3
E= 5 -1 = 4
F= -28 -9 = -37
G= -2 -15 = -17
H= -7-20 = -27
I= -42 +2 = -40
J= 15 +7 = 22
K= 5 -( 25-30) = 5 +5 = 10
L= -42 +45 = 3
M= -38 +56 -4 = 14
N= (2+18) / (-55+35)= 20/ -20 = -1
O= 7-( -3 +(5-12)) = 7 +3 -5 +12 = 17