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