ava-gray_60c1a36d301ae
ava-gray_60c1a36d301ae
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3xy-{(2xy+4x)+[3y-(x+xy+2xy)]} = 3xy-{(2xy+4x)+[3y-x-xy-2xy]} = 3xy-{2xy+4x+3y-x-xy-2xy} = 3xy-{3x-xy+3y} = 3xy-3x+xy-3y = -3x+4xy-3y <=== Expresión final