1/4 a^{c2}_{c0,c1,a2} b^{c3,a3}_{a0,a1} gamma1^{a2}_{a3} a+(c0) a+(c1) a+(a0) a+(a1) a-(c3) a-(c2)
+1/2 a^{c1}_{c0,c2,a0} b^{c2,a3}_{a1,a2} a+(c0) a+(a0) a+(a1) a+(a2) a-(a3) a-(c1)
+1/2 a^{c1}_{c0,c2,a2} b^{c2,a3}_{a0,a1} gamma1^{a2}_{a3} a+(c0) a+(a0) a+(a1) a-(c1)