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