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