j13j23j33m13m23m33⁢j11j12j13j21j22j23j31j32j33=∑mr⁢1,mr⁢2,r=1,2,3j11j12j13m11m12m13⁢j21j22j23m21m22m23⁢j31j32j33m13m23m33⁢j11j21j31m11m21m31⁢j12j22j32m12m22m32.