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