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Bonjour

A = 5/17 : (3/32 - 1/32)

A = 5/17 : 2/32

A = 5/17 x 32/2

A = 160/34

A = (2 x 80) / (2 x 17)

A = 80/17

B = 11/20 - 12/23 : - 2/23

B = 11/20 - 12/23 x - 23/2

B = 11/20 + 276/46

B = 11/20 + (46 x 6) / (46 x 1)

B = 11/20 + 6

B = 11/20 + (6 x 20) / (1 x 20)

B = 11/20 + 120/20

B = 131/20

C = 7/5 : (- 5/21 + - 1/21)

C = 7/5 : - 6/21

C = 7/5 x - 21/6

C = - 147/30

C = (3 x - 49) / (3 x 10)

C = - 49/10

D = - 11/2 - (7/3 + - 13/21)

D = - 11/2 - [(7 x 7) / (3 x 7) - 13/21]

D = - 11/2 - (49/21 - 13/21)

D = - 11/2 - 36/21

D = (- 11 x 21) / (2 x 21) - (36 x 2) / (21 x 2)

D = - 231/42 - 72/42

D = - 303/42

D = (3 x - 101) / (3 x 14)

D = - 101/14

E = - 7/5 + - 3/20 x - 7/3

E = - 7/5  + 21/60

E = (- 7 x 12) / (5 x 12) + 21/60

E = - 84/60 + 21/60

E = - 63/60

E = (3 x - 21) / (3 x 20)

E = - 21/20

F = - 8/5 + - 7/3 : - 5/32

F = - 8/5 - 7/3 x - 32/5

F = - 8/5 + 224/15

F = (- 8 x 3) / (5 x 3) + 224/15

F = - 24/15 + 224/15

F = 200/15

F = (5 x 40) / (5 x 3)

F = 40/3.