1/4 a^{}_{c0,c1,a0,a1} b^{c3,c4,a2}_{c2} gamma1^{a1}_{a2} a+(c0) a+(c1) a+(c2) a+(a0) a-(c4) a-(c3)
+1/2 a^{}_{c0,c3,a0,a1} b^{c2,c3,a2}_{c1} a+(c0) a+(c1) a+(a0) a+(a1) a-(a2) a-(c2)
+a^{}_{c0,c3,a0,a1} b^{c2,c3,a2}_{c1} gamma1^{a1}_{a2} a+(c0) a+(c1) a+(a0) a-(c2)
+1/4 a^{}_{c1,c2,a0,a1} b^{c1,c2,a2}_{c0} a+(c0) a+(a0) a+(a1) a-(a2)
+1/2 a^{}_{c1,c2,a0,a1} b^{c1,c2,a2}_{c0} gamma1^{a1}_{a2} a+(c0) a+(a0)