-a^{a0,a2}_{a1,v0} b^{}_{} c^{a4,v2}_{a3,v1} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(v0) a+(v1) a-(v2) a-(a0)
-a^{a0,a2}_{a1,v0} b^{}_{} c^{a4,v2}_{a3,v1} lambda2^{a1,a3}_{a2,a4} a+(v0) a+(v1) a-(v2) a-(a0)
-1/2 a^{a2,a3}_{a1,v0} b^{}_{} c^{a0,v2}_{a4,v1} lambda2^{a1,a4}_{a2,a3} a+(v0) a+(v1) a-(v2) a-(a0)