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