1/12 a^{a2}_{a0,a1} b^{a3}_{c0,c1,c2} lambda2^{a0,a1}_{a2,a3} a+(c0) a+(c1) a+(c2)
+1/6 a^{a1}_{a0,a2} b^{a3}_{c0,c1,c2} gamma1^{a2}_{a3} a+(c0) a+(c1) a+(c2) a+(a0) a-(a1)