Bonjour
D = (5/2 + - 8/3) / (3/4 - 1/6)
D = [(5 x 3) / (2 x 3) - (8 x 2) / (3 x 2)] : [(3 x 3) / (4 x 3) - (1 x 2) / (6 x 2)]
D = (15/6 - 16/6) : (9/12 - 2/12)
D = - 1/6 : 7/12
D = - 1/6 x 12/7
D = - 12/42
D = (2 x - 6) / (2 x 7)
D = - 6/7
E = (2 + 4/- 3) / (- 6/5 - 7)
E = [(2 x 3) / (1 x 3) - 4/3] : [- 6/5 - (7 x 5) / (1 x 5)]
E = (6/3 - 4/3) : (- 6/5 - 35/5)
E = 2/3 : - 41/5
E = 2/3 x - 5/41
E = - 10/123
