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