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