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0=2.8x^2(x^2(2.5x^2+y^2-2)+1.2y^2(y(3y-0.75)-6.0311)+3.09)+0.98y^2((y^2-3.01)y^2+3)-1.005
I think I have optimised shape and proportion. (I hope this isn't out of theme for the forum).