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