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