-1/8 a^{c0,a0}_{a1,v0} b^{v1,v2}_{c1,c2} c^{a3,a4}_{c3,a2} lambda2^{a1,a2}_{a3,a4} a+(c1) a+(c2) a+(c3) a+(v0) a-(v2) a-(v1) a-(a0) a-(c0)
+1/4 a^{c0,a2}_{a1,v0} b^{v1,v2}_{c1,c2} c^{a0,a4}_{c3,a3} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c1) a+(c2) a+(c3) a+(v0) a-(v2) a-(v1) a-(a0) a-(c0)
+1/4 a^{c0,a2}_{a1,v0} b^{v1,v2}_{c1,c2} c^{a0,a4}_{c3,a3} lambda2^{a1,a3}_{a2,a4} a+(c1) a+(c2) a+(c3) a+(v0) a-(v2) a-(v1) a-(a0) a-(c0)