a=5/36+3/24 amplificam prima cu 2 si a doua cu 3
a=10/72+9/72=19/72
b=5/12+1/24 amplify prima cu 2
b=10/24+1/24=11/24
c=5/48+1/36 amplify prima cu 3 si a 2 cu 4
c=15/144+4/144=19/144
a+b=19/72+11/24 amplific a 2 cu 3
a+b=19/72+33/72=52/72 simplficam cu 4
a+b=13/18
a+c=19/72+19/144 amplificam prima cu 2
a+c=38/144+19/144=57/144 simplificam cu 3
a+c=19/48
a+b+c=13/18+19/144 amplificam prima cu 8
a+b+c=104/144+19/144=123/144 simplificam cu 3 => a+b+c=41/48
