1/4 a^{v0,v1}_{a0,a1} b^{a3,a4,v2}_{a2} lambda2^{a1,a2}_{a3,a4} a+(a0) a-(v2) a-(v1) a-(v0)
+1/2 a^{v0,v1}_{a0,a3} b^{a2,a4,v2}_{a1} gamma1^{a3}_{a4} a+(a0) a+(a1) a-(v2) a-(v1) a-(v0) a-(a2)
+1/4 a^{v0,v1}_{a1,a2} b^{a3,a4,v2}_{a0} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a+(a0) a-(v2) a-(v1) a-(v0)
+1/8 a^{v0,v1}_{a1,a2} b^{a3,a4,v2}_{a0} lambda2^{a1,a2}_{a3,a4} a+(a0) a-(v2) a-(v1) a-(v0)