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