1/4 a^{a1,a2}_{a0,a3} b^{c2,a4}_{c0,c1} gamma1^{a3}_{a4} a+(c0) a+(c1) a+(a0) a-(a2) a-(a1) a-(c2)
+1/4 a^{a0,a3}_{a1,a2} b^{c2,a4}_{c0,c1} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(c1) a-(a0) a-(c2)