1/2 a^{c1}_{c0,a0,a3} b^{c2,a4}_{a1,a2} gamma1^{a3}_{a4} a+(c0) a+(a0) a+(a1) a+(a2) a-(c2) a-(c1)
-1/4 a^{c0}_{c1,a0,a1} b^{c1,a4}_{a2,a3} a+(a0) a+(a1) a+(a2) a+(a3) a-(a4) a-(c0)
-1/2 a^{c0}_{c1,a0,a3} b^{c1,a4}_{a1,a2} gamma1^{a3}_{a4} a+(a0) a+(a1) a+(a2) a-(c0)