a^{c0,a0}_{c3,v0} b^{c2,c3}_{c1,a1} c^{a2}_{v1} gamma1^{a1}_{a2} a+(c1) a+(v0) a+(v1) a-(a0) a-(c2) a-(c0)
+a^{c0,a1}_{c3,v0} b^{c2,c3}_{c1,a2} c^{a0}_{v1} eta1^{a2}_{a1} a+(c1) a+(v0) a+(v1) a-(a0) a-(c2) a-(c0)