Bonjour,
A: -5 x 7- (- 4 ) x ( - 5 )=
-35 - (20)= -35 -20 = -55
B: -6 + 6 x ( - 6 ) +6=
-6 + -36 +6 =
-36
C: - 5 - 4 x ( 2 - 6 x ( - 1 ) )=
-5 -4* (2 +6)=
-5 -4 * 8=
-5 -32 = -37
D: ( - 5 x 2 + 1 ) x ( 12- ( - 4) x ( -3 ) )
(-10 +1) ( 12 -( 12))=
-9 * 0 = 0