1/2+2/5+1/3=
3/4-1/3-1/6=
5/8+(4/5-1/4)=
2/5+2/3+3/5=
5/8+(4/5+3/8)=
1/8+3/4-1/3=
7/12+7/6-7/12=
3/4+5/8+1/4=
1/3+2/7+5/7=
2/5+7/8+3/5=
13/16+5/24+5/12=
2/7+3/4+5/7=
5/8-(1/8+3/10)=
2/3+1/3-2/27-2/27=
1/9+11/19+8/9+8/19=