1/8 a^{a0,a1}_{c4,a4} b^{c4,a2}_{c0,c1} c^{a3,a5}_{c2,c3} gamma1^{a4}_{a5} a+(c0) a+(c1) a+(c2) a+(c3) a-(a3) a-(a2) a-(a1) a-(a0)
+1/16 a^{a0,a1}_{c4,a4} b^{c4,a5}_{c0,c1} c^{a2,a3}_{c2,c3} gamma1^{a4}_{a5} a+(c0) a+(c1) a+(c2) a+(c3) a-(a3) a-(a2) a-(a1) a-(a0)