-a^{c0,a1}_{c3,a0} b^{c1}_{c4} c^{c3,c4}_{c2,v0} a+(c2) a+(a0) a+(v0) a-(a1) a-(c1) a-(c0)
+a^{c0,a1}_{c3,a0} b^{c3}_{c4} c^{c2,c4}_{c1,v0} a+(c1) a+(a0) a+(v0) a-(a1) a-(c2) a-(c0)