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