Ответ:
5 3/7×5/9×14/19=2 2/9
5 3/7×5/9=38/7×5/9=3 1/63
3 1/63×14/19=190/63×14/19=2 2/9
5 5/7×5/12×5 1/4×6/7÷1 1/2=7 1/7
5 5/7×5/12=40/7×5/12=10/7×5/3=
=50/21=2 8/21
2 8/21×5 1/4=50/21×21/4=25/2=12 1/2
12 1/2×6/7=25/2×6/7=75/7=10 5/7
10 5/7÷1 1/2=75/7×2/3=50/7=7 1/7
3/7÷1 1/7÷1 7/8÷11/25÷1 1/22÷3 2/11
=22/161
3/7÷1 1/7=3/7×7/8=3/8
3/8÷1 7/8=3/8×8/15=1/5
1/5÷11/25=1/5×25/11=5/11
5/11÷1 1/22=5/11×22/23=10/23
10/23÷3 2/11=10/23×11/35=22/161