(3y-1)(2y-3)+(6y-5)(y-4)=______,[ab(3-b)-2a(b-12b2)](-3a2b3)=______
(3y-1)(2y-3)+(6y-5)(y-4)=______,[ab(3-b)-2a(b-12b2)](-3a2b3)=______....
(3y-1)(2y-3)+(6y-5)(y-4)=______,[ab(3-b)-2a(b-12b2)](-3a2b3)=______.
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