1,2/9-7/16*2/9=(2/9)(1-7/16)=(2/9)*(9/16)=2/16=1/82,2/5*4*3/4=2/5*3=6/53,1/2*1/15+1/3*2=1/30+20/30=21/30=7/104,4/5*7/9*5/8=4/5*5/8*7/9=4/8*7/9=7/185,5/6*5/9+5/9*1/6=5/9*(5/6+1/6)=5/96,5/7*16*21/5=5/7*21/5*16=1/3*16=16/37,11/24*16=11/(4*6)*(4*4)=11/38,1/4*2/7=1/2*1/7=1/149,7/12*6+5/12*6=(7/12+5/12)*6=12/12*6=610...
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