Data:8 20/HOMFLYPT Polynomial
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[math]\displaystyle{ -z^2 a^4-2 a^4+z^4 a^2+4 z^2 a^2+4 a^2-z^2-1 }[/math]
[math]\displaystyle{ -z^2 a^4-2 a^4+z^4 a^2+4 z^2 a^2+4 a^2-z^2-1 }[/math]