-1/48 a^{a1,a4}_{a0} b^{}_{c0,c1,c2,c3} c^{}_{a2,a3,a5} eta1^{a5}_{a4} a+(c0) a+(c1) a+(c2) a+(c3) a+(a0) a+(a2) a+(a3) a-(a1)
+1/48 a^{a2,a3}_{a0} b^{}_{c0,c1,c2,c3} c^{}_{a1,a4,a5} eta1^{a5}_{a3} eta1^{a4}_{a2} a+(c0) a+(c1) a+(c2) a+(c3) a+(a0) a+(a1)
+1/96 a^{a2,a3}_{a0} b^{}_{c0,c1,c2,c3} c^{}_{a1,a4,a5} lambda2^{a4,a5}_{a2,a3} a+(c0) a+(c1) a+(c2) a+(c3) a+(a0) a+(a1)
+1/96 a^{a3,a4}_{a2} b^{}_{c0,c1,c2,c3} c^{}_{a0,a1,a5} lambda2^{a2,a5}_{a3,a4} a+(c0) a+(c1) a+(c2) a+(c3) a+(a0) a+(a1)