1/2 a^{v0}_{a0} b^{a3,a4}_{a1,a2} c^{v1}_{a5} lambda2^{a2,a5}_{a3,a4} a+(a0) a+(a1) a-(v1) a-(v0)
-1/2 a^{v0}_{a2} b^{a3,a4}_{a0,a1} c^{v1}_{a5} eta1^{a5}_{a4} gamma1^{a2}_{a3} a+(a0) a+(a1) a-(v1) a-(v0)
+1/4 a^{v0}_{a2} b^{a3,a4}_{a0,a1} c^{v1}_{a5} lambda2^{a2,a5}_{a3,a4} a+(a0) a+(a1) a-(v1) a-(v0)
-1/2 a^{v0}_{a2} b^{a4,a5}_{a0,a3} c^{v1}_{a1} lambda2^{a2,a3}_{a4,a5} a+(a0) a+(a1) a-(v1) a-(v0)