-a^{a2,v0}_{a0,a1} b^{}_{} c^{a4}_{a3} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(a0) a-(v0)
-a^{a2,v0}_{a0,a1} b^{}_{} c^{a4}_{a3} lambda2^{a1,a3}_{a2,a4} a+(a0) a-(v0)
-1/2 a^{a3,v0}_{a1,a2} b^{}_{} c^{a4}_{a0} lambda2^{a1,a2}_{a3,a4} a+(a0) a-(v0)