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