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