-1/2 a^{a0}_{c1} b^{c1,a1}_{c0,a3} c^{a2,a4}_{v0,v1} gamma1^{a3}_{a4} a+(c0) a+(v0) a+(v1) a-(a2) a-(a1) a-(a0)
-1/4 a^{a3}_{c1} b^{c1,a0}_{c0,a4} c^{a1,a2}_{v0,v1} eta1^{a4}_{a3} a+(c0) a+(v0) a+(v1) a-(a2) a-(a1) a-(a0)