bonjour
A = - 8 + 21 = 13
B = ( - 6 - 4) x 6 = - 10 x 6 = - 60
c = 1/2 + 5/8 = 4/8 + 5/8 = 9/8
d = - 3/25 x 35/12 = - 105/300 = - 7/ 20
E = - 840 / 10 080 = - 1/12