-1/12 a^{}_{a0,a1} b^{}_{c0,c1,c2,c3} c^{c3,a2}_{} a+(c0) a+(c1) a+(c2) a+(a0) a+(a1) a-(a2)
-1/6 a^{}_{a0,a1} b^{}_{c0,c1,c2,c3} c^{c3,a2}_{} gamma1^{a1}_{a2} a+(c0) a+(c1) a+(c2) a+(a0)
+1/24 a^{}_{a0,a1} b^{}_{c0,c1,c2,c3} c^{c4,a2}_{} gamma1^{a1}_{a2} a+(c0) a+(c1) a+(c2) a+(c3) a+(a0) a-(c4)