1/8+(5/9-1/4)=1/8+11/36=(1*9+11*2)/72=(9+22)/72=31/72
5/9-1/4=(5*4-1*9)/36=(20-9)/36=11/36
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1/8+(5/9-1/4)=1/8+11/36=(1*9+11*2)/72=(9+22)/72=31/72
5/9-1/4=(5*4-1*9)/36=(20-9)/36=11/36