=3 7/30-4 1/6+1 2/15+4 5/9-4 5/9=

3 7/30-4 5/30+1 4/30=6/30=1/5

=2 7/12+6 8/9-5+3 1/3=2 21/36+

6 32/36-5+3 12/36=6 41/36=7 5/36