1/48 a^{a0,a1}_{c0} b^{}_{c1,c2,c3,c4} c^{a4}_{a2,a3} lambda2^{a2,a3}_{a1,a4} a+(c0) a+(c1) a+(c2) a+(c3) a+(c4) a-(a0)
+1/24 a^{a0,a3}_{c0} b^{}_{c1,c2,c3,c4} c^{a2}_{a1,a4} eta1^{a4}_{a3} a+(c0) a+(c1) a+(c2) a+(c3) a+(c4) a+(a1) a-(a2) a-(a0)
+1/48 a^{a1,a2}_{c0} b^{}_{c1,c2,c3,c4} c^{a0}_{a3,a4} eta1^{a4}_{a2} eta1^{a3}_{a1} a+(c0) a+(c1) a+(c2) a+(c3) a+(c4) a-(a0)
+1/96 a^{a1,a2}_{c0} b^{}_{c1,c2,c3,c4} c^{a0}_{a3,a4} lambda2^{a3,a4}_{a1,a2} a+(c0) a+(c1) a+(c2) a+(c3) a+(c4) a-(a0)