j1j2j3m1m2m3=-1j1-j2-m3⁢Δ⁡j1⁢j2⁢j3⁢j1+m1!⁢j1-m1!⁢j2+m2!⁢j2-m2!⁢j3+m3!⁢j3-m3!12⁢∑s-1ss!⁢j1+j2-j3-s!⁢j1-m1-s!⁢j2+m2-s!⁢j3-j2+m1+s!⁢j3-j1-m2+s!,