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