Bonjour,
A = (1/2 + 7/8) * 8/11
A = (8/16 + 14/16) * 8/11
A = (22/16) * 8/11
A = 11/8 * 8/11
A = 1
B = 2 - 64/15
B = 30-64/15
B = -34/15
C = (240/75) / (40/75)
C = 240/40
C = 6
D = 7/8 - 5/8*5
D = 7/8 - 25/8
D = 7-25/8
D = -18/8 = -9/4
E = ((30-12+5)/15) / ((30+12+5)/15)
E = (23/15) / (47/15)
E = 23/47
