(1 5/7*1/2+3/4*6/7)+(1 1/3*6/7-1 5/7*1/24)+(1 5/7*1/3-3/2*6/7)
(15\14 + 9\14)+(22\7-5\56)+(5\7-9\7)=24\14+171\56-4\7=96\56+171\56-32\56=235\56
(15/7*1/2+3/4*6/7)+(11/3*6/7-1 5/7*1/24)+(15/7*1/3-3/2*6/7) = 4.19