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