Data:K11n67/HOMFLYPT Polynomial

From Knot Atlas

z⁴a⁻⁴−z⁴ + a²z²−z²a⁻² + 3z²a⁻⁴−z²a⁻⁶−4z² + 2a²−a⁻² + 3a⁻⁴−a⁻⁶−2