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