a^{c0,v2}_{a1,v0} b^{c1,a0}_{v1,v2} c^{a2}_{c2} gamma1^{a1}_{a2} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)
-a^{c0,v2}_{a1,v0} b^{c1,a2}_{v1,v2} c^{a0}_{c2} gamma1^{a1}_{a2} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)