bonjour,
A= - 8 - 4 x ( 10 +(- 3 ))
A= - 8 - 4 x 7
A= - 8 - 28
A= -36
D= 5/8 + 6/5
D= 5x5/8x5 + 6x8/5x8
D= 25/40 + 48/40
D= 73 / 40
D= 1.825
N= 7/6 - 3/4 / 2/3
N= 7/6 - 3x3/4x3 / 2x4/3x4
N= 7/6 - 9/12 / 8/12
N=7/6 - 9/8
N= 7x8 / 6x8 - 9x6/8x6
N= 56/24 - 54/24
N= 1/24