(b−c/a)yzdx=(c−a/b)xzdy=(a−b/c)xydz
xyz(b−c/a+c−a/b+a−b/c)xdx+ydy+zdz=(b−c/a)yzdx
b−c/a+c−a/b+a−b/cx2+y2+z2=b−c/ax2+C1
xyz(b−c/a+c−a/b+a−b/c)xdx+ydy+zdz=(c−a/b)xzdy
b−c/a+c−a/b+a−b/cx2+y2+z2=c−a/by2+C2
xyz(b−c/a+c−a/b+a−b/c)xdx+ydy+zdz=(a−b/c)xydz
b−c/a+c−a/b+a−b/cx2+y2+z2=a−b/cz2+C3
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