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