5/6 X 2/4 : (3/7 X 1/4) =
3/4 X (5/6 + 1/4) =
4/3 X 3/5 + (2/4 X 1/2)=
( 8/6 -1/3 ) X (3/3 +1/4)=
1/2 : ( 1/6 X 1/3 ) =
1/2 + (2/3 + 4/6) =
35/9
2
13/16
5/4
9
21/20
