Bonjour
B = (- 10 + 2 x (- 2)) / (- 3 + 5)
B = (- 10 - 4) / 2
B = - 14/2
B = - 7
C = 5/4 + 3/2
C = 5/4 + (3 x 2) / (2 x 2)
C = 5/4 + 6/4
C = 11/4
D = 4/3 - 1/3 x 5/2
D = 4/3 - 5/6
D = (4 x 2) / (3 x 2) - 5/6
D = 8/6 - 5/6
D = 3/6
D = (3 x 1) / (3 x 2)
D = 1/2.