1/16 a^{a1,a2}_{c0,a0} b^{c1,c2}_{a3,v0} c^{v1,v2}_{c3,c4} lambda2^{a0,a3}_{a1,a2} a+(c0) a+(c3) a+(c4) a+(v0) a-(v2) a-(v1) a-(c2) a-(c1)
-1/4 a^{a1,a2}_{c3,a0} b^{c0,c3}_{a3,v0} c^{v1,v2}_{c1,c2} eta1^{a3}_{a2} a+(c1) a+(c2) a+(a0) a+(v0) a-(v2) a-(v1) a-(a1) a-(c0)
-1/8 a^{a1,a2}_{c3,a0} b^{c0,c3}_{a3,v0} c^{v1,v2}_{c1,c2} lambda2^{a0,a3}_{a1,a2} a+(c1) a+(c2) a+(v0) a-(v2) a-(v1) a-(c0)