Function eqRank

src/compute-engine/boxed-expression/order.ts:129–133

(x: Expression)

}

/**
 * Sort terms of a sum with `addOrder` semantics, computing each term's
 * degree/lexicographic keys once instead of on every comparison (`addOrder`
 * re-walks both expressions per comparison — O(n log n) walks per sort).
 * The comparator chain below returns exactly the values `addOrder` would,
 * and `Array.sort` is stable, so the result order is identical.
 */
export function sortAddTerms(