Antennarity: (1+x)³=x³+3x²+3x+1; total subsets=8; bi-on-tri=3; C(4,4)=1 (tetra-full)

Sympy-exact integer-anchor witness of the N-glycan antennarity generating-function canonical expansion and its power-set / binomial-coefficient anchors. Setup: (1+x)^n is the canonical generating function for subsets of an n-element set,…