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