1/2 a^{c1}_{c0,a0,a3} b^{a1,a2,a4}_{c2} gamma1^{a3}_{a4} a+(c0) a+(c2) a+(a0) a-(a2) a-(a1) a-(c1)
+1/2 a^{c1}_{c0,a1,a2} b^{a0,a3,a4}_{c2} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a+(c0) a+(c2) a-(a0) a-(c1)
+1/4 a^{c1}_{c0,a1,a2} b^{a0,a3,a4}_{c2} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(c2) a-(a0) a-(c1)