-1/4 a^{c0,c1}_{a0,a3} b^{c3,v0}_{c2,c4} c^{c4,a4}_{a1,a2} gamma1^{a3}_{a4} a+(c2) a+(a0) a+(a1) a+(a2) a-(v0) a-(c3) a-(c1) a-(c0)