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