( 1 1/2+2 2/3+3 3/4)·3 4/5·(14-15 1/8:2 1/5)=
1)
1 1/2+2 2/3+3 3/4=(1+2+3)+1/2+2/3+3/4=6+23/12=6+1 11/12=7 11/12
2)
15 1/8:2 1/5=121/8:11/5=121/8·5/11=55/8=6 7/8
3)
14-6 7/8=(14-6)-7/8=8-7/8=7+1/8=7 1/8
4)
7 11/12· 3 4/5=361/12=30 1/12
5)
30 1/12·7 1/8=361/12·57/8=214 11/32