(7 целых -2/3): (1 целая 3: 4-16)•1 целая 1/5+2 цэлых 2/3+1/6

7-2/3=6 1/3
1 3/4-16=-14 1/4
6 1/3:(-14 1/4)=19/3*(-4/57)=-4/9
-4/9*1 1/5=-4/9*6/5=-8/15
-8/15+2 2/3=-8/15+8/3=-8/15+40/15=32/15
32/15+1/6=64/30+5/30=69/30=2 3/10=2.3