3x ^ 2 * y - 5x * y ^ 2, 7x * y ^ 2 - 4x ^ 2 * y - 2x ^ 2 * y + 6x * y ^ 2
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Step-by-step explanation:
4x^2 y,−3xy^2,−5xy^2 ,5x^2 y=4x^2 y+(−3xy^2 )+(−5xy^2 )+5x^2 y
=4x^2 y+5x^2 y−3xy^2 −5xy^2
=9x^2 y−8xy^2
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