-1/4 a^{c0,c1}_{c3,a0} b^{c2,a1}_{v0,v1} c^{c3}_{v2} gamma1^{a0}_{a1} a+(v0) a+(v1) a+(v2) a-(c2) a-(c1) a-(c0)
+1/4 a^{c0,c1}_{c3,a0} b^{c3,a1}_{v0,v1} c^{c2}_{v2} gamma1^{a0}_{a1} a+(v0) a+(v1) a+(v2) a-(c2) a-(c1) a-(c0)