-1/2 a^{a0}_{c0} b^{v0,v1}_{c1,a1} c^{a3,v2}_{c2,a2} eta1^{a2}_{a0} gamma1^{a1}_{a3} a+(c0) a+(c1) a+(c2) a-(v2) a-(v1) a-(v0)
-1/2 a^{a0}_{c0} b^{v0,v1}_{c1,a1} c^{a3,v2}_{c2,a2} lambda2^{a1,a2}_{a0,a3} a+(c0) a+(c1) a+(c2) a-(v2) a-(v1) a-(v0)