Given that the product of a polynomial and the monomial - 7x ^ 5Y ^ 4 is 21x ^ 5Y ^ 4-28x ^ 7Y ^ 4 + 7Y (2x ^ 3Y ^ 2) ^ 2, find the polynomial | Math enthusiast | Mathematical art

Given that the product of a polynomial and the monomial - 7x ^ 5Y ^ 4 is 21x ^ 5Y ^ 4-28x ^ 7Y ^ 4 + 7Y (2x ^ 3Y ^ 2) ^ 2, find the polynomial

[21x^5y^4-28x^7y^4+7y(2x^3y^2)^2]/-7x^5y^4=21x^5y^4/-7x^5y^4-28x^7y^4/-7x^5y^4+7y(2x^3y^2)^2/-7x^5y^4=-3+4x^2-4xy

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