Data:L9a27/Multivariable Alexander

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 -v^2 u^2+3 v u^2-2 u^2+3 v^2 u-7 v u+3 u-2 v^2+3 v-1}