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