1/2 a^{a0,v0}_{c0,c1} b^{c1,a3}_{a1,a2} c^{}_{} lambda2^{a1,a2}_{a0,a3} a+(c0) a-(v0)
-1/4 a^{a0,v0}_{c0,c1} b^{c2,a3}_{a1,a2} c^{}_{} lambda2^{a1,a2}_{a0,a3} a+(c0) a+(c1) a-(v0) a-(c2)
-a^{a2,v0}_{c0,c1} b^{c1,a1}_{a0,a3} c^{}_{} eta1^{a3}_{a2} a+(c0) a+(a0) a-(v0) a-(a1)