1/2 a^{c2,a0}_{c0,c1} b^{a2}_{a1} c^{c3}_{a3} eta1^{a3}_{a2} eta1^{a1}_{a0} a+(c0) a+(c1) a-(c3) a-(c2)
+1/2 a^{c2,a0}_{c0,c1} b^{a2}_{a1} c^{c3}_{a3} lambda2^{a1,a3}_{a0,a2} a+(c0) a+(c1) a-(c3) a-(c2)
-a^{c1,a0}_{c0,c2} b^{a2}_{a1} c^{c2}_{a3} eta1^{a3}_{a2} a+(c0) a+(a1) a-(a0) a-(c1)
+a^{c1,a0}_{c0,c2} b^{a2}_{a1} c^{c2}_{a3} eta1^{a3}_{a2} eta1^{a1}_{a0} a+(c0) a-(c1)
+a^{c1,a0}_{c0,c2} b^{a2}_{a1} c^{c2}_{a3} lambda2^{a1,a3}_{a0,a2} a+(c0) a-(c1)
+a^{c1,a2}_{c0,c2} b^{a1}_{a0} c^{c2}_{a3} eta1^{a3}_{a2} a+(c0) a+(a0) a-(a1) a-(c1)
-a^{c1,a2}_{c0,c2} b^{a0}_{a3} c^{c2}_{a1} eta1^{a3}_{a2} a+(c0) a+(a1) a-(a0) a-(c1)