1/2 a^{a1,a2}_{a0,a3} b^{a4}_{c0} gamma1^{a3}_{a4} a+(c0) a+(a0) a-(a2) a-(a1)
+1/2 a^{a0,a3}_{a1,a2} b^{a4}_{c0} lambda2^{a1,a2}_{a3,a4} a+(c0) a-(a0)