-1/12 a^{}_{c0,a0} b^{}_{c1,c2,c3,c4} c^{c4}_{a1,a2} a+(c0) a+(c1) a+(c2) a+(c3) a+(a0) a+(a1) a+(a2)
-1/48 a^{}_{c4,a0} b^{}_{c0,c1,c2,c3} c^{c4}_{a1,a2} a+(c0) a+(c1) a+(c2) a+(c3) a+(a0) a+(a1) a+(a2)