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