-1/2 a^{a0}_{v0} b^{c1,c2}_{c0,a1} c^{a3,v1}_{c3,a2} eta1^{a2}_{a0} gamma1^{a1}_{a3} a+(c0) a+(c3) a+(v0) a-(v1) a-(c2) a-(c1)
-1/2 a^{a0}_{v0} b^{c1,c2}_{c0,a1} c^{a3,v1}_{c3,a2} lambda2^{a1,a2}_{a0,a3} a+(c0) a+(c3) a+(v0) a-(v1) a-(c2) a-(c1)