-1/4 a^{v0}_{c0} b^{c2,c3}_{c1,a0} c^{a2,a3}_{c4,a1} lambda2^{a0,a1}_{a2,a3} a+(c0) a+(c1) a+(c4) a-(v0) a-(c3) a-(c2)
+1/2 a^{v0}_{c3} b^{c1,c3}_{c0,a0} c^{a2,a3}_{c2,a1} lambda2^{a0,a1}_{a2,a3} a+(c0) a+(c2) a-(v0) a-(c1)
+a^{v0}_{c3} b^{c1,c3}_{c0,a2} c^{a1,a3}_{c2,a0} gamma1^{a2}_{a3} a+(c0) a+(c2) a+(a0) a-(v0) a-(a1) a-(c1)