Exercice 1 :
A = a * 2 * 8
A = 16a
B = 4 * 8 * a
B = 32a
C = 9 * y * 8
C = 72y
D = 6 * b * 7
D = 42b
E = 2 * x * 5
E = 10x
F = 3 * x * 2
F = 6x
G = 9 * 2 * x
G = 18x
H = 2 * 8 * x
H = 16x
K = 2 * b * 2
K = 4b
L = 9 * x * 3
L = 27x
M = x * 3 * 3
M = 9x
N = 6 * x * 7
N = 42x
O = a * 8 * 2
O = 16a
P = 7 * a * 7
P = 49a
Q = y * 4 * 8
Q = 32y
R = 6 * x * 8
R = 48x
Exercice 2 :
A = 3 * x * 7 * 3
A = 63x
B = 2 * 3 * 5 * a
B = 30a
C = x * 4 * 7 * 3
C = 84x
D = 9 * 5 * x * 3
D = 135x
E = 7 * b * 5 * 4
E = 140b
F = x * 9 * 3 * 7
F = 189x
G = 3 * x * 8 * 3
G = 72x
H = 4 * 5 * x * 4
H = 80x
K = 4 * 5 * x * 8
K = 160x
L = 5 * z * 4 * 5
L = 100z
M = 9 * 9 * z * 5
M = 405z
N = 3 * x * 5 * 2
N = 30x
O = 8 * 6 * 9 * x
O = 432x
P = 6 * 9 * x * 5
P = 270x
Q = a * 2 * 6 * 8
Q = 96a
R = 9 * b * 9 * 3
R = 243b
