Data:L9a20/HOMFLYPT Polynomial
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[math]\displaystyle{ a z^7-a^3 z^5+4 a z^5-z^5 a^{-1} -2 a^3 z^3+4 a z^3-2 z^3 a^{-1} -a z+a^3 z^{-1} -a z^{-1} }[/math]
[math]\displaystyle{ a z^7-a^3 z^5+4 a z^5-z^5 a^{-1} -2 a^3 z^3+4 a z^3-2 z^3 a^{-1} -a z+a^3 z^{-1} -a z^{-1} }[/math]