2y(x+y-1)+3xy -4x(x-y+5)
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Step-by-step explanation :
2y(x+y-1)3xy-4x(x-y+5)
=2xy+2y^2-2y+3xy-4x^2+4xy-20x
=9xy+2y^2-2y-4x^2-20x
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