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