1.12*(5/6-3/4)=12*(5/6)-12*(3/4)=10-9=1
2.5/7-(5/7)*(3/8)=(5/7)*(1-3/8)=(5/7)*(5/8)=25/56
3.36*(1/3+1/4-1/6)=36*(1/3)+36*(1/4)-36*(1/6)=12+9-6=15
1.12*(5/6-3/4)=12*(5/6)-12*(3/4)=10-9=1
2.5/7-(5/7)*(3/8)=(5/7)*(1-3/8)=(5/7)*(5/8)=25/56
3.36*(1/3+1/4-1/6)=36*(1/3)+36*(1/4)-36*(1/6)=12+9-6=15