a^{a0}_{c0} b^{a1,a2}_{c1,c4} c^{c3,c4}_{c2,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a+(c2) a-(a1) a-(a0) a-(c3)
+1/4 a^{a0}_{c0} b^{a1,a2}_{c2,c3} c^{c2,c3}_{c1,a3} a+(c0) a+(c1) a+(a3) a-(a2) a-(a1) a-(a0)
-1/2 a^{a0}_{c0} b^{a1,a2}_{c2,c3} c^{c2,c3}_{c1,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a-(a1) a-(a0)
+1/2 a^{a2}_{c0} b^{a0,a1}_{c1,c4} c^{c3,c4}_{c2,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a+(c2) a-(a1) a-(a0) a-(c3)
-1/4 a^{a2}_{c0} b^{a0,a1}_{c2,c3} c^{c2,c3}_{c1,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a-(a1) a-(a0)
-1/2 a^{a0}_{c2} b^{a1,a2}_{c0,c3} c^{c2,c3}_{c1,a3} a+(c0) a+(c1) a+(a3) a-(a2) a-(a1) a-(a0)
+a^{a0}_{c2} b^{a1,a2}_{c0,c3} c^{c2,c3}_{c1,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a-(a1) a-(a0)
+1/2 a^{a2}_{c2} b^{a0,a1}_{c0,c3} c^{c2,c3}_{c1,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a-(a1) a-(a0)
+1/2 a^{a0}_{c4} b^{a1,a2}_{c0,c1} c^{c3,c4}_{c2,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a+(c2) a-(a1) a-(a0) a-(c3)
+1/4 a^{a2}_{c4} b^{a0,a1}_{c0,c1} c^{c3,c4}_{c2,a3} eta1^{a3}_{a2} a+(c0) a+(c1) a+(c2) a-(a1) a-(a0) a-(c3)