1/4 a^{}_{c0,a0,a1,a2} b^{c3,a3}_{c1,c2} gamma1^{a2}_{a3} a+(c0) a+(c1) a+(c2) a+(a0) a+(a1) a-(c3)
+1/12 a^{}_{c2,a0,a1,a2} b^{c2,a3}_{c0,c1} a+(c0) a+(c1) a+(a0) a+(a1) a+(a2) a-(a3)
+1/4 a^{}_{c2,a0,a1,a2} b^{c2,a3}_{c0,c1} gamma1^{a2}_{a3} a+(c0) a+(c1) a+(a0) a+(a1)