1/2 a^{c0}_{a1} b^{c2,a0}_{c1,c3} c^{c3,a2}_{v0,v1} gamma1^{a1}_{a2} a+(c1) a+(v0) a+(v1) a-(a0) a-(c2) a-(c0)
-1/2 a^{c0}_{a1} b^{c2,a2}_{c1,c3} c^{c3,a0}_{v0,v1} gamma1^{a1}_{a2} a+(c1) a+(v0) a+(v1) a-(a0) a-(c2) a-(c0)