a^{c1,v0}_{c0,c3} b^{c2}_{a0} c^{c3}_{v0} a+(c0) a+(a0) a-(c2) a-(c1)
-a^{c1,v0}_{c0,c3} b^{c3}_{a0} c^{c2}_{v0} a+(c0) a+(a0) a-(c2) a-(c1)
-a^{c0,v0}_{c1,c2} b^{c1}_{a0} c^{c2}_{v0} a+(a0) a-(c0)
+a^{c0,v0}_{c1,c2} b^{c1}_{a0} c^{c2}_{v1} a+(a0) a+(v1) a-(v0) a-(c0)