Data:K15a70727/HOMFLYPT Polynomial

[math]\displaystyle{ -a^2 z^{12}+a^4 z^{10}-9 a^2 z^{10}+2 z^{10}+7 a^4 z^8-32 a^2 z^8-z^8 a^{-2} +15 z^8+17 a^4 z^6-57 a^2 z^6-6 z^6 a^{-2} +41 z^6+17 a^4 z^4-52 a^2 z^4-12 z^4 a^{-2} +50 z^4+6 a^4 z^2-20 a^2 z^2-9 z^2 a^{-2} +26 z^2-a^4-2 a^{-2} +4 }[/math]