1/6-5/9=(3-10)/18= -7/18
1/2-3/7=(7-6)/14=1/14
-7/18*1/14*36/5= -2/10= -1/5
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1/6-5/9=(3-10)/18= -7/18
1/2-3/7=(7-6)/14=1/14
-7/18*1/14*36/5= -2/10= -1/5