1,4=7/2
3.5=7/2
1.2=6/5
(a-b)-(a+0.6b)=a-b-a-0.6b=-1.6b
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1,4=7/2
3.5=7/2
1.2=6/5
(a-b)-(a+0.6b)=a-b-a-0.6b=-1.6b