a^{v0}_{a0} b^{a3,v1}_{c1,a1} c^{c0,c1}_{a2,a4} eta1^{a4}_{a3} a+(a0) a+(a1) a+(a2) a-(v1) a-(v0) a-(c0)
+1/2 a^{v0}_{a3} b^{a4,v1}_{c1,a0} c^{c0,c1}_{a1,a2} gamma1^{a3}_{a4} a+(a0) a+(a1) a+(a2) a-(v1) a-(v0) a-(c0)