1целых 11/35:(3целых1/6-2целых 19/24+1/5):3цел 3/7=
((35*1+11)/35):((3*6+1)/6-(2*24+19)/24+1/5):(3*7+3)/7=
46/35:(19/6-67/24+1/5):24/7=46/35:(76/24-67/24+1/5):24/7=
46/35:(76*5/120-67*5/120+24/120):24/7=46/35:(380/120-335/120+24/120):24/7=
46/35:(69/120):24/7=(46/35:(69/120))*7:24=((46*120)/(35*69))*7:24=((46*24)/(7*69))*7:24=
46*24*7/7*69*24=46/69=2/3