-1/4 a^{v1,v2}_{c0,v0} b^{c1,a2}_{a0,a1} c^{a3}_{c2} lambda2^{a0,a1}_{a2,a3} a+(c0) a+(c2) a+(v0) a-(v2) a-(v1) a-(c1)
-1/4 a^{v1,v2}_{c1,v0} b^{c1,a2}_{a0,a1} c^{a3}_{c0} lambda2^{a0,a1}_{a2,a3} a+(c0) a+(v0) a-(v2) a-(v1)
+1/2 a^{v1,v2}_{c1,v0} b^{c1,a1}_{a0,a2} c^{a3}_{c0} gamma1^{a2}_{a3} a+(c0) a+(a0) a+(v0) a-(v2) a-(v1) a-(a1)