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