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