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