1/4 a^{a1,a2}_{a0,a4} b^{c0,c1,a3,a5}_{} gamma1^{a4}_{a5} a+(a0) a-(a3) a-(a2) a-(a1) a-(c1) a-(c0)
+1/8 a^{a0,a1}_{a2,a3} b^{c0,c1,a4,a5}_{} gamma1^{a3}_{a5} gamma1^{a2}_{a4} a-(a1) a-(a0) a-(c1) a-(c0)
+1/16 a^{a0,a1}_{a2,a3} b^{c0,c1,a4,a5}_{} lambda2^{a2,a3}_{a4,a5} a-(a1) a-(a0) a-(c1) a-(c0)
-1/4 a^{a0,a4}_{a2,a3} b^{c0,c1,a1,a5}_{} lambda2^{a2,a3}_{a4,a5} a-(a1) a-(a0) a-(c1) a-(c0)