-a^{v2}_{a0} b^{c0,a1}_{v0,v2} c^{v1}_{a2} eta1^{a2}_{a1} a+(a0) a+(v0) a-(v1) a-(c0)
-a^{v2}_{a1} b^{c0,a2}_{v0,v2} c^{v1}_{a0} gamma1^{a1}_{a2} a+(a0) a+(v0) a-(v1) a-(c0)