1/4 a^{c0,a0}_{c6,a2} b^{c3,c6}_{c1,c2} c^{a1,a3}_{c4,c5} gamma1^{a2}_{a3} a+(c1) a+(c2) a+(c4) a+(c5) a-(a1) a-(a0) a-(c3) a-(c0)