# Polynomials and Rational Expressions Question

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- [math]9x^4y^6+21x^2y^3-12x^2y^4[/math]
- [math]6x^2y^2+10x^2y^3-7x^2y^4[/math]
- [math]9x^4y^3+21x^3y^4-12x^2y^5[/math]
- [math]6x^4y^3+10x^3y^4-7x^2y^5[/math]