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Formel zum Bild "Harmonisch Umschlungenes [Variante I] von Hermann Bauer": [(x^2+y^2)^2 + 2ax*(x^2+y^2)+8a^2y^2^]*[(x^2+y^2)^2 - 2ax*(x^2+y^2)+8a^2y^2^]*[(y^2+x^2)^2 + 2ay*(y^2+x^2)+8a^2x^2^]*[(y^2+x^2)^2 - 2ay*(y^2+x^2)+8a^2x^2^]*[x^2+y^2-(2a)^2^]*[x^2+y^2-a^2^]*[a^2x^2+(2a)^2*y^2-4a^4^]*[(2a)^2*x^2+a^2y^2-4a^4^] = 0 mit a