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