Bonjour
Pour x = 3 et y = 2
G = xy + 4
G = 3 * 2 + 4
G = 6 + 4
G = 10
H = x - y + 8
H = 3 - 2 + 8
H = 11 - 2
H = 9
K = xy - x - y + 4
K = 3 * 2 - 3 - 2 + 4
K = 6 - 5 + 4
K = 10 - 5
K = 5.
L = xyx
L = 3 * 2 * 3
L = 6 * 3
L = 18.