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