-1/48 a^{c1}_{c0,a0,a3} b^{}_{c2,c3,c4,c5} c^{a4}_{a1,a2} gamma1^{a3}_{a4} a+(c0) a+(c2) a+(c3) a+(c4) a+(c5) a+(a0) a+(a1) a+(a2) a-(c1)