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resultant( -4 x + y + 9 x^2 y + 4 x y^2, 3 x^2 y + 8 x y^2 + 2 x - 3 y, y)
resultant( -4 x + y + 9 x^2 y + 4 x y^2, 3 x^2 y + 8 x y^2 + 2 x - 3 y, y)
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