Bonjour:

F= 9/3 -2/3= 7/3

U = 12/30 -2/30 = 10/30 = 1/3

N= 24/30 +16/30-35/30 = 5/30 = 1/6

K=7/9+1/3 -1/7+8/7

=7/9 +1/3 +7/7

= 7/9 +1/3 +1

= 7/9 +3/9 +9/9

= 19/9

P=

(-27*35*-24) /(36*18*-21)

= -22 680 / 13 608

= -3 240/ 1 944

= 270/162

= 30/18

= 5/3

U=

2/3*60/100

120/300

=12/30

= 6/15

= 2/5

N=

9/5*25/18

= 225/90

= 5/2

K =

7*5/14

= 35/14

= 5/2