-1/4 a^{c0,v0}_{a0,a1} b^{a2}_{v0} c^{c2,c3}_{c1,a3} eta1^{a3}_{a2} a+(c1) a+(a0) a+(a1) a-(c3) a-(c2) a-(c0)
-1/2 a^{c0,v0}_{a0,a2} b^{a3}_{v0} c^{c2,c3}_{c1,a1} gamma1^{a2}_{a3} a+(c1) a+(a0) a+(a1) a-(c3) a-(c2) a-(c0)