(2 1/8+7/8)-(5/9-3/9)= (3 2/7+5/7)-(3/13-1/13)=
5 /712+3 3/12-1 1/12=
18*6/8*27=
24*22*25/50*72*11=
29*13+29*2/58*30=
9*32-32*6/16*18=
9/14-(19/35+2/21=
4/25+0,8-2/3=
3/14+(11/63-5/42)=
5 /712+3 3/12-1 1/12=
18*6/8*27=
24*22*25/50*72*11=
29*13+29*2/58*30=
9*32-32*6/16*18=
9/14-(19/35+2/21=
4/25+0,8-2/3=
3/14+(11/63-5/42)=