Question

x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2

Answer 1

x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2

=16x^3y^3 -49x^3y^3-45^3y^3

=-78x^3y^3

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