-5/6+3/8=
-7,5+2,8=
4,5-8,3=
-2 5/7-1 3/14=​

1. -5/6+3/8=-20/24+9/24=-11/24

2. -7,5+2,8=-4,7

3.4,5-8,3=-3,8

4.-2 5/7 -1 3/14=-19/7-17/14=-38/14-17/14=-55/17