5/9+9/8= 1/8+7/8= 19/24-13/24= 19/36+3/36= 3/7+4/7=
11/8-1/8= 1/4-1/9= 12/13-3/13= 8/9+4/11+1/9=
1-1/6-1/6= 3/4+1/4+1/4= 7/8-3/8+3/8= 5/6+7/9+3/8=
5/8-2/5+1/4= 14/15-(2/3-1/5)= 19/20+(4/5-7/40)= 7/6-(7/10-1/3)=
11/8-(2/3-1/4)= (4+2/7)-(9/14+1/2)= 13/6-(3/4-5/12+1/3)=
3/4+1/5= 3/4-1/5= 5/6+2/9= 5/6-2/9= 2/3+3/5=
2/3-3/5= 6/7+1/2= 6/7-1/2= 2/3+1/6= 1/3+1/4=