-a^{a0}_{c0} b^{c0,a2}_{c1,a1} c^{c1}_{v0} a+(a1) a+(v0) a-(a2) a-(a0)
+a^{a1}_{c0} b^{c0,a0}_{c1,a2} c^{c1}_{v0} eta1^{a2}_{a1} a+(v0) a-(a0)
+a^{a1}_{c0} b^{c1,a0}_{c2,a2} c^{c2}_{v0} eta1^{a2}_{a1} a+(c0) a+(v0) a-(a0) a-(c1)
-a^{a1}_{c2} b^{c1,a0}_{c0,a2} c^{c2}_{v0} eta1^{a2}_{a1} a+(c0) a+(v0) a-(a0) a-(c1)
+a^{a1}_{c2} b^{c2,a0}_{c0,a2} c^{c1}_{v0} eta1^{a2}_{a1} a+(c0) a+(v0) a-(a0) a-(c1)