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