-1/4 a^{a2,a3}_{a0,a1} b^{c0}_{a4} c^{c2,c3}_{c1,a5} eta1^{a5}_{a3} eta1^{a4}_{a2} a+(c1) a+(a0) a+(a1) a-(c3) a-(c2) a-(c0)
-1/8 a^{a2,a3}_{a0,a1} b^{c0}_{a4} c^{c2,c3}_{c1,a5} lambda2^{a4,a5}_{a2,a3} a+(c1) a+(a0) a+(a1) a-(c3) a-(c2) a-(c0)
+1/4 a^{a3,a4}_{a0,a2} b^{c0}_{a1} c^{c2,c3}_{c1,a5} lambda2^{a2,a5}_{a3,a4} a+(c1) a+(a0) a+(a1) a-(c3) a-(c2) a-(c0)
-1/4 a^{a3,a4}_{a0,a2} b^{c0}_{a5} c^{c2,c3}_{c1,a1} lambda2^{a2,a5}_{a3,a4} a+(c1) a+(a0) a+(a1) a-(c3) a-(c2) a-(c0)