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