-1/4 a^{}_{c0,a0,a1} b^{c0,a2}_{v0,v1} a+(a0) a+(a1) a+(v0) a+(v1) a-(a2)
-1/2 a^{}_{c0,a0,a1} b^{c0,a2}_{v0,v1} gamma1^{a1}_{a2} a+(a0) a+(v0) a+(v1)
+1/2 a^{}_{c0,a0,a1} b^{c1,a2}_{v0,v1} gamma1^{a1}_{a2} a+(c0) a+(a0) a+(v0) a+(v1) a-(c1)