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