Data:K15a74686/HOMFLYPT Polynomial

[math]\displaystyle{ -z^8 a^{-2} -3 z^8 a^{-4} +3 z^6 a^{-2} -8 z^6 a^{-4} +6 z^6 a^{-6} +2 z^6-a^2 z^4+6 z^4 a^{-2} -15 z^4 a^{-4} +11 z^4 a^{-6} -4 z^4 a^{-8} +4 z^2 a^{-2} -10 z^2 a^{-4} +11 z^2 a^{-6} -4 z^2 a^{-8} +z^2 a^{-10} -2 a^{-4} +4 a^{-6} -2 a^{-8} +1 }[/math]