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