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