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