dx/y^2+yz+z^2=dy/z^2+zx+x^2=dz/x^2+xy+y^2
dx-dy/-(x-y)(x+y+z)=dx-dz/-(x-z)(x+y+z)
dx-dy/-(x-y)=dx-dz/-(x-z)
log(x-y)=log(x-z)+c1
(x-y)/(x-z)=c1
xdx+ydy+zdz/(x+y+z)(yz+zx+xy)
=d(x^2+y^2*z^2)/2(x+y+z)(yz+zx+xy)
(y+z)dx+(z+x)dy+(x+y)dz/(x+y+z)(x^2+y^2+z^2)
=d(yz+zx+xy)/2(x+y+z)(yz+zx+xy)
--\u0026gt;
(x-y)/(x-z)=c1
(x^2+y^2+z^2)^2=(yz+zx+xy)^2=c2
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