1/4 a^{a0}_{c0} b^{c2,c3}_{c1,v0} c^{a3,v1}_{a1,a2} lambda2^{a1,a2}_{a0,a3} a+(c0) a+(c1) a+(v0) a-(v1) a-(c3) a-(c2)
-1/2 a^{a0}_{c2} b^{c1,c2}_{c0,v0} c^{a3,v1}_{a1,a2} lambda2^{a1,a2}_{a0,a3} a+(c0) a+(v0) a-(v1) a-(c1)
-a^{a2}_{c2} b^{c1,c2}_{c0,v0} c^{a1,v1}_{a0,a3} eta1^{a3}_{a2} a+(c0) a+(a0) a+(v0) a-(v1) a-(a1) a-(c1)