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