Data:9 19/HOMFLYPT Polynomial
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[math]\displaystyle{ -z^2 a^4+z^4 a^2+z^2 a^2+a^2+z^4-2 z^2 a^{-2} - a^{-2} + a^{-4} }[/math]
[math]\displaystyle{ -z^2 a^4+z^4 a^2+z^2 a^2+a^2+z^4-2 z^2 a^{-2} - a^{-2} + a^{-4} }[/math]