1+3/71-3/7-1-3/7-1+3/7

Question

1+3/7
1-3/7
-1-3/7
-1+3/7

Answer 1

1 + 3/7 = 1,3/7
1 - 3/7 = 4/7
-1 - 3/7 = -1,3/7
-1 + 3/7 = -4/7

Answer 2

1+3\7=1 3\7
1-3\7=4\7
-1-3\7=-1 3\7
-1+3\7= -4\7
Вроде так