-1/4 a^{a1}_{a0} b^{v0,v1}_{c0,a2} c^{a3,v2}_{c1,c2} eta1^{a2}_{a1} gamma1^{a0}_{a3} a+(c0) a+(c1) a+(c2) a-(v2) a-(v1) a-(v0)
-1/4 a^{a1}_{a0} b^{v0,v1}_{c0,a2} c^{a3,v2}_{c1,c2} lambda2^{a0,a2}_{a1,a3} a+(c0) a+(c1) a+(c2) a-(v2) a-(v1) a-(v0)