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