1/2 a^{a0,a1}_{c0,c1} b^{c0}_{a2} c^{c1}_{a3} a+(a2) a+(a3) a-(a1) a-(a0)
+a^{a0,a1}_{c0,c1} b^{c0}_{a2} c^{c1}_{a3} eta1^{a3}_{a1} eta1^{a2}_{a0}
+1/2 a^{a0,a1}_{c0,c1} b^{c0}_{a2} c^{c1}_{a3} lambda2^{a2,a3}_{a0,a1}
+1/2 a^{a0,a1}_{c0,c1} b^{c2}_{a2} c^{c3}_{a3} eta1^{a3}_{a1} eta1^{a2}_{a0} a+(c0) a+(c1) a-(c3) a-(c2)
+1/4 a^{a0,a1}_{c0,c1} b^{c2}_{a2} c^{c3}_{a3} lambda2^{a2,a3}_{a0,a1} a+(c0) a+(c1) a-(c3) a-(c2)
-a^{a0,a2}_{c0,c1} b^{c0}_{a1} c^{c1}_{a3} eta1^{a3}_{a2} a+(a1) a-(a0)
+a^{a0,a2}_{c0,c1} b^{c0}_{a3} c^{c1}_{a1} eta1^{a3}_{a2} a+(a1) a-(a0)
+a^{a0,a1}_{c0,c2} b^{c1}_{a2} c^{c2}_{a3} eta1^{a3}_{a1} eta1^{a2}_{a0} a+(c0) a-(c1)
+1/2 a^{a0,a1}_{c0,c2} b^{c1}_{a2} c^{c2}_{a3} lambda2^{a2,a3}_{a0,a1} a+(c0) a-(c1)
-a^{a0,a1}_{c0,c2} b^{c2}_{a2} c^{c1}_{a3} eta1^{a3}_{a1} eta1^{a2}_{a0} a+(c0) a-(c1)
-1/2 a^{a0,a1}_{c0,c2} b^{c2}_{a2} c^{c1}_{a3} lambda2^{a2,a3}_{a0,a1} a+(c0) a-(c1)
-a^{a0,a2}_{c0,c2} b^{c1}_{a1} c^{c2}_{a3} eta1^{a3}_{a2} a+(c0) a+(a1) a-(a0) a-(c1)
+a^{a0,a2}_{c0,c2} b^{c2}_{a1} c^{c1}_{a3} eta1^{a3}_{a2} a+(c0) a+(a1) a-(a0) a-(c1)
+a^{a0,a2}_{c0,c2} b^{c1}_{a3} c^{c2}_{a1} eta1^{a3}_{a2} a+(c0) a+(a1) a-(a0) a-(c1)
-a^{a0,a2}_{c0,c2} b^{c2}_{a3} c^{c1}_{a1} eta1^{a3}_{a2} a+(c0) a+(a1) a-(a0) a-(c1)