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