-1/4 a^{a0}_{c0} b^{a1,v0}_{c1,c2} c^{a4,v1}_{a2,a3} lambda2^{a2,a3}_{a1,a4} a+(c0) a+(c1) a+(c2) a-(v1) a-(v0) a-(a0)
+1/4 a^{a1}_{c0} b^{a0,v0}_{c1,c2} c^{a4,v1}_{a2,a3} lambda2^{a2,a3}_{a1,a4} a+(c0) a+(c1) a+(c2) a-(v1) a-(v0) a-(a0)
-1/2 a^{a1}_{c0} b^{a2,v0}_{c1,c2} c^{a0,v1}_{a3,a4} eta1^{a4}_{a2} eta1^{a3}_{a1} a+(c0) a+(c1) a+(c2) a-(v1) a-(v0) a-(a0)
-1/4 a^{a1}_{c0} b^{a2,v0}_{c1,c2} c^{a0,v1}_{a3,a4} lambda2^{a3,a4}_{a1,a2} a+(c0) a+(c1) a+(c2) a-(v1) a-(v0) a-(a0)