1/4 a^{c0}_{a2} b^{a0,a1}_{c1,c4} c^{c4,a3}_{c2,c3} gamma1^{a2}_{a3} a+(c1) a+(c2) a+(c3) a-(a1) a-(a0) a-(c0)
-1/2 a^{c0}_{a2} b^{a0,a3}_{c1,c4} c^{c4,a1}_{c2,c3} gamma1^{a2}_{a3} a+(c1) a+(c2) a+(c3) a-(a1) a-(a0) a-(c0)