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