ContourPlot[( (0.580509-3.37124 10^-14 sqrt(1.32235 10^27 xy 2.96509 10^26)) sqrt(x) (2.76868 10^-14 sqrt(1.32235 10^27 xy 2.96509 10^26)-0.476751) 1/sqrt(80) 1.29446 xy )/(xy)=1,{x,0,2},{y,4,15}]

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