(1 1/2+ 2 2/3 +3 3/4)*3 4/5*(14- 15 1/8: 2 1/5)=

( 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 11/122)15 1/8:2 1/5=121/8:11/5=121/8·5/11=55/8=6 7/83)14-6 7/8=(14-6)-7/8=8-7/8=7+1/8=7 1/84)7 11/12· 3 4/5=361/12=30 1/125)30 1/12·7 1/8=361/12·57/8=214 11/32