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