Bonjour,
M = 4/9 - 2 x (13 + 3) / (13 - 1)
M = 4/9 - 2 x 16/12
M = 4/9 - 32/12
M = (4 x 4) / (9 x 4) - (32 x 3) / (12 x 3)
M = 16/36 - 96/36
M = - 80/36
M = (4 x - 20) / (4 x 9)
M = - 20/9
N = - 5/3 - (6/4 x 8/18) + 2/3
N = - 5/3 - 48/72 + 2/3
N = - 5/3 - (24 x 2) / (24 x 3) + 2/3
N = - 5/3 - 2/3 + 2/3
N = - 5/3
Q = - 1/3 - 7/6 x (4/7 - 5/4) + 3
Q = - 1/3 - 7/6 x [(4 x 4) / (7 x 4) - (5 x 7) / (4 x 7)] + 3
Q = - 1/3 - 7/6 x (16/28 - 35/28) + 3
Q = - 1/3 - 7/6 x - 19/28 + 3
Q = - 1/3 + 133/168 + 3
Q = (- 1 x 8) / (3 x 8) + (7 x 19) / (7 x 24) + (3 x 24) / (1 x 24)
Q = - 8/24 + 19/24 + 72/24
Q = 83/24
R = (11/3 + 11/7) : (11/6 + 11/4)
R = [(11 x 7) / (3 x 7) + (11 x 3) / (7 x 3)] : [(11 x 2) / (6 x 2) + (11 x 3) / (4 x 3)]
R = (77/21 + 33/21) : (22/12 + 33/12)
R = 110/21 : 55/12
R = 110/21 x 12/55
R = 1 320/1 155
R = (165 x 8) / (165 x 7)
R = 8/7
