1/2 a^{v0}_{c0} b^{a0,a1}_{c1,v0} c^{c1}_{a2} a+(c0) a+(a2) a-(a1) a-(a0)
-a^{v0}_{c0} b^{a0,a1}_{c1,v0} c^{c1}_{a2} eta1^{a2}_{a1} a+(c0) a-(a0)
+a^{v0}_{c0} b^{a0,a1}_{c1,v0} c^{c2}_{a2} eta1^{a2}_{a1} a+(c0) a+(c1) a-(a0) a-(c2)
+a^{v0}_{c0} b^{a0,a1}_{c1,v1} c^{c1}_{a2} eta1^{a2}_{a1} a+(c0) a+(v1) a-(v0) a-(a0)
-1/2 a^{v0}_{c1} b^{a0,a1}_{c0,v0} c^{c1}_{a2} a+(c0) a+(a2) a-(a1) a-(a0)
+a^{v0}_{c1} b^{a0,a1}_{c0,v0} c^{c1}_{a2} eta1^{a2}_{a1} a+(c0) a-(a0)
-a^{v0}_{c1} b^{a0,a1}_{c0,v1} c^{c1}_{a2} eta1^{a2}_{a1} a+(c0) a+(v1) a-(v0) a-(a0)