1/576 a^{a0,a1,a2,a3}_{} b^{}_{c0,c1,c2,c3} c^{}_{a4,a5,a6,a7} eta1^{a7}_{a3} eta1^{a6}_{a2} eta1^{a5}_{a1} eta1^{a4}_{a0} a+(c0) a+(c1) a+(c2) a+(c3)
+1/192 a^{a0,a1,a2,a3}_{} b^{}_{c0,c1,c2,c3} c^{}_{a4,a5,a6,a7} eta1^{a7}_{a3} eta1^{a6}_{a2} lambda2^{a4,a5}_{a0,a1} a+(c0) a+(c1) a+(c2) a+(c3)
-1/864 a^{a0,a1,a2,a3}_{} b^{}_{c0,c1,c2,c3} c^{}_{a4,a5,a6,a7} eta1^{a7}_{a3} lambda3^{a4,a5,a6}_{a0,a1,a2} a+(c0) a+(c1) a+(c2) a+(c3)
+1/768 a^{a0,a1,a2,a3}_{} b^{}_{c0,c1,c2,c3} c^{}_{a4,a5,a6,a7} lambda2^{a6,a7}_{a2,a3} lambda2^{a4,a5}_{a0,a1} a+(c0) a+(c1) a+(c2) a+(c3)
+1/13824 a^{a0,a1,a2,a3}_{} b^{}_{c0,c1,c2,c3} c^{}_{a4,a5,a6,a7} lambda4^{a4,a5,a6,a7}_{a0,a1,a2,a3} a+(c0) a+(c1) a+(c2) a+(c3)
-1/864 a^{a0,a1,a2,a6}_{} b^{}_{c0,c1,c2,c3} c^{}_{a3,a4,a5,a7} eta1^{a7}_{a6} a+(c0) a+(c1) a+(c2) a+(c3) a+(a3) a+(a4) a+(a5) a-(a2) a-(a1) a-(a0)
+1/192 a^{a0,a1,a4,a5}_{} b^{}_{c0,c1,c2,c3} c^{}_{a2,a3,a6,a7} eta1^{a7}_{a5} eta1^{a6}_{a4} a+(c0) a+(c1) a+(c2) a+(c3) a+(a2) a+(a3) a-(a1) a-(a0)
+1/384 a^{a0,a1,a4,a5}_{} b^{}_{c0,c1,c2,c3} c^{}_{a2,a3,a6,a7} lambda2^{a6,a7}_{a4,a5} a+(c0) a+(c1) a+(c2) a+(c3) a+(a2) a+(a3) a-(a1) a-(a0)
-1/144 a^{a0,a2,a3,a4}_{} b^{}_{c0,c1,c2,c3} c^{}_{a1,a5,a6,a7} eta1^{a7}_{a4} eta1^{a6}_{a3} eta1^{a5}_{a2} a+(c0) a+(c1) a+(c2) a+(c3) a+(a1) a-(a0)
-1/96 a^{a0,a2,a3,a4}_{} b^{}_{c0,c1,c2,c3} c^{}_{a1,a5,a6,a7} eta1^{a7}_{a4} lambda2^{a5,a6}_{a2,a3} a+(c0) a+(c1) a+(c2) a+(c3) a+(a1) a-(a0)
+1/864 a^{a0,a2,a3,a4}_{} b^{}_{c0,c1,c2,c3} c^{}_{a1,a5,a6,a7} lambda3^{a5,a6,a7}_{a2,a3,a4} a+(c0) a+(c1) a+(c2) a+(c3) a+(a1) a-(a0)