помогите
4 1/6+2/3
7/12-1/4
1 3/4-5/6
6 1/5-2/3

4 1/6 +2/3=25/6 +2/3=25/6+4/6=29/6=4 5/6
7/12-1/4=7/12-3/12=4/12=1/3
1 3/4-5/6=7/4-5/6=21/12-10/12=11/12
6 1/5 -2/3=31/5-2/3=93/15-10/15=83/15=5 8/15