-a^{c0}_{a0} b^{c1,a2}_{c2,a1} c^{c2}_{a3} eta1^{a3}_{a2} a+(a0) a+(a1) a-(c1) a-(c0)
+a^{c0}_{a2} b^{c1,a3}_{c2,a0} c^{c2}_{a1} gamma1^{a2}_{a3} a+(a0) a+(a1) a-(c1) a-(c0)