-1/4 a^{c1}_{c0} b^{c4,a1}_{c2,c3} c^{a0,a4}_{a2,a3} lambda2^{a2,a3}_{a1,a4} a+(c0) a+(c2) a+(c3) a-(a0) a-(c4) a-(c1)
+1/4 a^{c0}_{c3} b^{c3,a1}_{c1,c2} c^{a0,a4}_{a2,a3} lambda2^{a2,a3}_{a1,a4} a+(c1) a+(c2) a-(a0) a-(c0)
+1/4 a^{c0}_{c3} b^{c3,a3}_{c1,c2} c^{a1,a2}_{a0,a4} eta1^{a4}_{a3} a+(c1) a+(c2) a+(a0) a-(a2) a-(a1) a-(c0)