1/4 a^{c1}_{c0} b^{a1,a2}_{c2,a0} c^{v0,v1}_{a3,a4} eta1^{a4}_{a2} eta1^{a3}_{a1} a+(c0) a+(c2) a+(a0) a-(v1) a-(v0) a-(c1)
+1/8 a^{c1}_{c0} b^{a1,a2}_{c2,a0} c^{v0,v1}_{a3,a4} lambda2^{a3,a4}_{a1,a2} a+(c0) a+(c2) a+(a0) a-(v1) a-(v0) a-(c1)
-1/4 a^{c1}_{c0} b^{a2,a3}_{c2,a1} c^{v0,v1}_{a0,a4} lambda2^{a1,a4}_{a2,a3} a+(c0) a+(c2) a+(a0) a-(v1) a-(v0) a-(c1)