Question

4 4/9•5/8+5/8•3 5/8
3 7/8•4/5-1 5/8•4/5
2 11/15•1 1/19•3/10- 1 1/6•1 1/19
4 7/9•1 13/14-3 7/12•1 13/14+1 13/14•1 13/14