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