1/4 a^{a3,a4}_{a0,a1} b^{c0,c1}_{a2,a5} c^{c2}_{a6} eta1^{a6}_{a4} eta1^{a5}_{a3} a+(a0) a+(a1) a+(a2) a-(c2) a-(c1) a-(c0)
+1/8 a^{a3,a4}_{a0,a1} b^{c0,c1}_{a2,a5} c^{c2}_{a6} lambda2^{a5,a6}_{a3,a4} a+(a0) a+(a1) a+(a2) a-(c2) a-(c1) a-(c0)
+1/8 a^{a3,a4}_{a0,a1} b^{c0,c1}_{a5,a6} c^{c2}_{a2} eta1^{a6}_{a4} eta1^{a5}_{a3} a+(a0) a+(a1) a+(a2) a-(c2) a-(c1) a-(c0)
+1/16 a^{a3,a4}_{a0,a1} b^{c0,c1}_{a5,a6} c^{c2}_{a2} lambda2^{a5,a6}_{a3,a4} a+(a0) a+(a1) a+(a2) a-(c2) a-(c1) a-(c0)
+1/8 a^{a4,a5}_{a0,a3} b^{c0,c1}_{a1,a2} c^{c2}_{a6} lambda2^{a3,a6}_{a4,a5} a+(a0) a+(a1) a+(a2) a-(c2) a-(c1) a-(c0)
-1/4 a^{a4,a5}_{a0,a3} b^{c0,c1}_{a1,a6} c^{c2}_{a2} lambda2^{a3,a6}_{a4,a5} a+(a0) a+(a1) a+(a2) a-(c2) a-(c1) a-(c0)