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