1/2 a^{c0,c1}_{a0,v0} b^{c3,a1}_{c2,c4} c^{c4}_{a2} eta1^{a2}_{a1} a+(c2) a+(a0) a+(v0) a-(c3) a-(c1) a-(c0)
+1/2 a^{c0,c1}_{a1,v0} b^{c3,a2}_{c2,c4} c^{c4}_{a0} gamma1^{a1}_{a2} a+(c2) a+(a0) a+(v0) a-(c3) a-(c1) a-(c0)