1/2 a^{c0,v2}_{a0,a3} b^{c2,v0}_{c1,v2} c^{a4,v1}_{a1,a2} gamma1^{a3}_{a4} a+(c1) a+(a0) a+(a1) a+(a2) a-(v1) a-(v0) a-(c2) a-(c0)