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