Data:K12a1107/Alexander Polynomial

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Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle 2 t^4-8 t^3+16 t^2-20 t+21-20 t^{-1} +16 t^{-2} -8 t^{-3} +2 t^{-4} }