-1/2 a^{v0}_{a0,a3} b^{a1,a2,a4,v1}_{} gamma1^{a3}_{a4} a+(a0) a-(v1) a-(v0) a-(a2) a-(a1)
-1/2 a^{v0}_{a1,a2} b^{a0,a3,a4,v1}_{} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a-(v1) a-(v0) a-(a0)
-1/4 a^{v0}_{a1,a2} b^{a0,a3,a4,v1}_{} lambda2^{a1,a2}_{a3,a4} a-(v1) a-(v0) a-(a0)