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