a^{c1,a0}_{c0,a2} b^{c3,a1,a3}_{c2} gamma1^{a2}_{a3} a+(c0) a+(c2) a-(a1) a-(a0) a-(c3) a-(c1)
-1/2 a^{c0,a1}_{c2,a0} b^{c2,a2,a3}_{c1} a+(c1) a+(a0) a-(a3) a-(a2) a-(a1) a-(c0)
-a^{c0,a0}_{c2,a2} b^{c2,a1,a3}_{c1} gamma1^{a2}_{a3} a+(c1) a-(a1) a-(a0) a-(c0)