-a^{c1}_{c0} b^{a0}_{c3} c^{c2,c3}_{a1,v0} eta1^{a1}_{a0} a+(c0) a+(v0) a-(c2) a-(c1)
+a^{c0}_{c1} b^{a0}_{c2} c^{c1,c2}_{a1,v0} a+(a1) a+(v0) a-(a0) a-(c0)
+a^{c0}_{c1} b^{a0}_{c2} c^{c1,c2}_{a1,v0} eta1^{a1}_{a0} a+(v0) a-(c0)
+a^{c0}_{c3} b^{a0}_{c1} c^{c2,c3}_{a1,v0} eta1^{a1}_{a0} a+(c1) a+(v0) a-(c2) a-(c0)