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