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