1/2 a^{c0}_{c4} b^{c1,c2}_{a0,a2} c^{c4,a3}_{c3,a1} gamma1^{a2}_{a3} a+(c3) a+(a0) a+(a1) a-(c2) a-(c1) a-(c0)
-a^{c0}_{c4} b^{c1,c4}_{a0,a2} c^{c3,a3}_{c2,a1} gamma1^{a2}_{a3} a+(c2) a+(a0) a+(a1) a-(c3) a-(c1) a-(c0)