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