1/4 a^{a0,a1}_{c0,c1} b^{c3}_{c2,a2,a3} eta1^{a3}_{a1} eta1^{a2}_{a0} a+(c0) a+(c1) a+(c2) a-(c3)
+1/8 a^{a0,a1}_{c0,c1} b^{c3}_{c2,a2,a3} lambda2^{a2,a3}_{a0,a1} a+(c0) a+(c1) a+(c2) a-(c3)
-1/2 a^{a0,a2}_{c0,c1} b^{c3}_{c2,a1,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a+(c2) a+(a1) a-(a0) a-(c3)
-1/4 a^{a0,a1}_{c0,c2} b^{c2}_{c1,a2,a3} a+(c0) a+(c1) a+(a2) a+(a3) a-(a1) a-(a0)
-1/2 a^{a0,a1}_{c0,c2} b^{c2}_{c1,a2,a3} eta1^{a3}_{a1} eta1^{a2}_{a0} a+(c0) a+(c1)
-1/4 a^{a0,a1}_{c0,c2} b^{c2}_{c1,a2,a3} lambda2^{a2,a3}_{a0,a1} a+(c0) a+(c1)
+a^{a0,a2}_{c0,c2} b^{c2}_{c1,a1,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a+(a1) a-(a0)