-1/4 a^{c0}_{v0} b^{c3,a0}_{c1,c2} c^{c4,a3}_{a1,a2} lambda2^{a1,a2}_{a0,a3} a+(c1) a+(c2) a+(v0) a-(c4) a-(c3) a-(c0)
+1/2 a^{c0}_{v0} b^{c2,a0}_{c1,c3} c^{c3,a3}_{a1,a2} lambda2^{a1,a2}_{a0,a3} a+(c1) a+(v0) a-(c2) a-(c0)
-a^{c0}_{v0} b^{c2,a2}_{c1,c3} c^{c3,a1}_{a0,a3} eta1^{a3}_{a2} a+(c1) a+(a0) a+(v0) a-(a1) a-(c2) a-(c0)