[10000ダウンロード済み√] (x y z)^3-x^3-y^3-z^3 106226-(x+y+z)(x^2+y^2+z^2-xy-yz-zx)=x^3+y^3+z^3-3xyz
Pascal's (or Tartaglia's) Tetrahedron the left outline is a binomial expansion of $(xy)^3$, while the right outline is a binomial expansion of $(xz)^3$ and the bottom outline is a binomial expansion of $(yz)^3$
