[x,y,z]=meshgrid(linspace(-1.3,1.3));
val=(x.^2 + (9/4)*y.^2 + z.^2 - 1).^3 - x.^2.*z.^3 - (1/9)*y.^2.*z.^3;
isosurface(x,y,z,val,0);
axis equal;
view(-10,24);
colormap([1 0.2 0.2])
val=(x.^2 + (9/4)*y.^2 + z.^2 - 1).^3 - x.^2.*z.^3 - (1/9)*y.^2.*z.^3;
isosurface(x,y,z,val,0);
axis equal;
view(-10,24);
colormap([1 0.2 0.2])
1910

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