d(ln(√(x^2+y^2)))/dx-d(atan(y/x))/dy,d(ln(√(x^2+y^2)))/dy+d(atan(y/x))/dxd(ln(√(x^2+y^2)))/dx-d(atan(y/x))/dy,d(ln(√(x^2+y^2)))/dy+d(atan(y/x))/dx

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