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