bonjour
E = 30/7 x 12/5 x 49/15
E = ( 30 x 12 x 49 ) / ( 7 x 5 x 15 )
E = 17 640 / 525
E = 168/5
F = 5/4 + 15/36 + 2
F = 45/36 + 15/36 + 72/36
F = 132/36
F = 11/3
G = 35/24 x 18 x 4/14
G = ( 35 x 18 x 4 ) / ( 24 x 14 )
G = 2 520 / 336
G = 15/2
H = 13/5 - 2 + 1/15
H = 39/15 - 30/15 + 1/15
H = 10/15 = 2 /3
