1/144 a^{a3}_{a0,a1,a2} b^{}_{c0,c1,c2,c3} c^{c0,c1,c2,c3}_{} a+(a0) a+(a1) a+(a2) a-(a3)
+1/216 a^{a3}_{a0,a1,a2} b^{}_{c0,c1,c2,c6} c^{c3,c4,c5,c6}_{} a+(c0) a+(c1) a+(c2) a+(a0) a+(a1) a+(a2) a-(a3) a-(c5) a-(c4) a-(c3)
+1/48 a^{a3}_{a0,a1,a2} b^{}_{c0,c1,c4,c5} c^{c2,c3,c4,c5}_{} a+(c0) a+(c1) a+(a0) a+(a1) a+(a2) a-(a3) a-(c3) a-(c2)
+1/36 a^{a3}_{a0,a1,a2} b^{}_{c0,c2,c3,c4} c^{c1,c2,c3,c4}_{} a+(c0) a+(a0) a+(a1) a+(a2) a-(a3) a-(c1)