1/4 a^{v0,v1}_{a0,a1} b^{v2}_{c0} c^{a3,a4}_{c1,a2} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(c1) a+(a0) a-(v2) a-(v1) a-(v0)
+1/4 a^{v0,v1}_{a1,a2} b^{v2}_{c0} c^{a3,a4}_{c1,a0} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a+(c0) a+(c1) a+(a0) a-(v2) a-(v1) a-(v0)
+1/8 a^{v0,v1}_{a1,a2} b^{v2}_{c0} c^{a3,a4}_{c1,a0} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(c1) a+(a0) a-(v2) a-(v1) a-(v0)