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( a^2 x^3 - b^2 y^4 )^2 =(a^2 x^3)^2-2.a^2x^3.b^2 y^4+(b^2 y^4)^2 =a^4 x^6-2a^2b^2x^3y^4+b^4y^8
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Answered
( a^2 x^3 - b^2 y^4 )^2 =(a^2 x^3)^2-2.a^2x^3.b^2 y^4+(b^2 y^4)^2 =a^4 x^6-2a^2b^2x^3y^4+b^4y^8