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Is there a way to find resultant of two polynomials whose coefficients are not numbers. For example, $a_0x^3+a_1x^2y+a_2xy^2+a_3x^2z+a_4xz^2+a_5y^3+a_6y^2z+a_7yz^2+a_8z^3+a_9xyz$ and $a_0x^2+a_1xy+a_2xz+a_3yz+a_4y^2+a_5z^2$. I am getting the error "RuntimeError: resultant(): arguments must be polynomials". Thanks