1) 1/3*(2 2/15*6 1/4-5 1/3*1 1/8)+4 5/9=1/3*(32/15*25/4-16/3*9/8)+4 5/9=1/3(40/3-6)+4 5/9=1/3*7 1/3+4 5/9=2 4/9+4 5/9=7
2) 30 4/5-1 2/5*(1 4/5*(12 7/12-9 19/36)-17/35*1 11/34)
12 7/12-9 19/36=12 21/36-9 19/36=3 2/36=3 1/18
1 4/5*3 1/18=9/5*55/18=11/2
17/35*1 11/34=17/35*45/34=9/14
11/2-9/14=77/14-9/14=68/14=34/7
1 2/5*34/7=7/5*34/7=34/5=6 4/5
30 4/5-6 4/5=24