-a^{a0}_{c0} b^{v0}_{c1} c^{c1,a2}_{a1,v0} a+(c0) a+(a1) a-(a2) a-(a0)
-a^{a1}_{c0} b^{v0}_{c1} c^{c1,a0}_{a2,v0} eta1^{a2}_{a1} a+(c0) a-(a0)
+a^{a1}_{c0} b^{v0}_{c1} c^{c2,a0}_{a2,v0} eta1^{a2}_{a1} a+(c0) a+(c1) a-(a0) a-(c2)
+a^{a1}_{c0} b^{v0}_{c1} c^{c1,a0}_{a2,v1} eta1^{a2}_{a1} a+(c0) a+(v1) a-(v0) a-(a0)
+a^{a0}_{c1} b^{v0}_{c0} c^{c1,a2}_{a1,v0} a+(c0) a+(a1) a-(a2) a-(a0)
+a^{a1}_{c1} b^{v0}_{c0} c^{c1,a0}_{a2,v0} eta1^{a2}_{a1} a+(c0) a-(a0)
-a^{a1}_{c1} b^{v0}_{c0} c^{c1,a0}_{a2,v1} eta1^{a2}_{a1} a+(c0) a+(v1) a-(v0) a-(a0)