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