Question

3 2/7+1 3/4+5/9=
7 8/15-2 4/21=
19 1/4-8 7/9-1 2/5=
(7 5/4-1 2/7)-(5/9+4/16)=​

Answer 1

2) 5 12/35

3) 9 13/180

4) 6 10/63