1/4 a^{c1}_{c0} b^{a0,a1}_{c4,a2} c^{c4,a3}_{c2,c3} gamma1^{a2}_{a3} a+(c0) a+(c2) a+(c3) a-(a1) a-(a0) a-(c1)
-1/4 a^{c0}_{c4} b^{a0,a1}_{c1,a2} c^{c4,a3}_{c2,c3} gamma1^{a2}_{a3} a+(c1) a+(c2) a+(c3) a-(a1) a-(a0) a-(c0)