-1/4 a^{a1,a2}_{c0,a0} b^{c1,c2}_{a3,v0} c^{c4,v2}_{c3,v1} lambda2^{a0,a3}_{a1,a2} a+(c0) a+(c3) a+(v0) a+(v1) a-(v2) a-(c4) a-(c2) a-(c1)
-1/2 a^{a1,a2}_{c3,a0} b^{c0,c1}_{a3,v0} c^{c3,v2}_{c2,v1} eta1^{a3}_{a2} a+(c2) a+(a0) a+(v0) a+(v1) a-(v2) a-(a1) a-(c1) a-(c0)
-1/4 a^{a1,a2}_{c3,a0} b^{c0,c1}_{a3,v0} c^{c3,v2}_{c2,v1} lambda2^{a0,a3}_{a1,a2} a+(c2) a+(v0) a+(v1) a-(v2) a-(c1) a-(c0)
+a^{a1,a2}_{c3,a0} b^{c0,c3}_{a3,v0} c^{c2,v2}_{c1,v1} eta1^{a3}_{a2} a+(c1) a+(a0) a+(v0) a+(v1) a-(v2) a-(a1) a-(c2) a-(c0)
+1/2 a^{a1,a2}_{c3,a0} b^{c0,c3}_{a3,v0} c^{c2,v2}_{c1,v1} lambda2^{a0,a3}_{a1,a2} a+(c1) a+(v0) a+(v1) a-(v2) a-(c2) a-(c0)