-1/4 a^{v1,v2}_{a0,v0} b^{a3,v3}_{a1,a2} c^{a4}_{c0} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(a0) a+(v0) a-(v3) a-(v2) a-(v1)
+1/2 a^{v1,v2}_{a1,v0} b^{a3,v3}_{a0,a2} c^{a4}_{c0} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a+(c0) a+(a0) a+(v0) a-(v3) a-(v2) a-(v1)
+1/2 a^{v1,v2}_{a1,v0} b^{a3,v3}_{a0,a2} c^{a4}_{c0} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(a0) a+(v0) a-(v3) a-(v2) a-(v1)