-1/4 a^{c0}_{a1} b^{c3,a0}_{c1,c2} c^{a3,a4}_{c4,a2} lambda2^{a1,a2}_{a3,a4} a+(c1) a+(c2) a+(c4) a-(a0) a-(c3) a-(c0)
+1/2 a^{c0}_{a1} b^{c3,a2}_{c1,c2} c^{a0,a4}_{c4,a3} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c1) a+(c2) a+(c4) a-(a0) a-(c3) a-(c0)
+1/2 a^{c0}_{a1} b^{c3,a2}_{c1,c2} c^{a0,a4}_{c4,a3} lambda2^{a1,a3}_{a2,a4} a+(c1) a+(c2) a+(c4) a-(a0) a-(c3) a-(c0)