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