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