Bonsoir :
P=21/8 × 2-[2+(13-9)×3]-(10-6)
P=21/4-[2+(4)×3)-(4)
P=21/4-(2+4×3)-4
P=21/4-(2+12)-4
P=21/4-(14)-4
P=21/4+14-4
P=21/4-18
P=21/4-72/4
P=-51/4
G=66/6(11-7)×3 × [4×(4-2)]/12
G=11×4×3 × 4×2/12
G=132 × 2/3
G= 44 × 2
G=88
H= [3×7-(18-9)]+[(9×3)+1]-8
H=(21-9)+(27+1)-8
H=12+28-8
H=12+20
H=32
j’espère t'avoir t'aider