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