Bonsoir,

A=7-4² +12-15-3³

= 7  -16 +12-15 -9=-21

B=(-5)³ +3(11-7)²

= -125 +3* 4²

= -125 +3*16

= -125 +48

=-77

C = (4-6) -3² +36-8²

= -2 -9 +36-64

= -39

D=4²-5x2³-3²

=16 -5* 8 -9

= 16 -40 -9

= -33