Bonsoir l'ami :) !
A = 11 + 2 (x - 6) + 4 ( -3x - 6 )
= 11 + 2x - 12 - 12x - 24
= - 25 - 10x
B = -2(x - 5) - 3(7 - 4x)
= -2x + 10 - 21 + 12x
= - 10x - 12
C = 8 + 2y - 5(2y - 6) + 4
= 8 + 2y - 10y + 30 + 4
= 42 - 8y
D = -7y - 4 (3y - 6) + 3 + 2(3y - 7)
= -7y - 12y + 24 + 3 + 6y - 14
= -13y + 13
E = -5z + 5z(z - 3) - 7(6 - 8z)
= -5z + 5z^2 - 15z - 42 + 56z
= 36z + 5z^2 - 42
= 5z^2 + 36z - 42
