Function scaleTri

src/compute-engine/rubi/rubi-utils.ts:1763–1768

(s: Expression, t: TriParts)

          constA = constA.add(t);
          continue;
        }
        const p = binomialPartsX(t, x);
        if (p === null) return null;
        if (acc === null) acc = p;
        else if (zeroQ(acc.n.sub(p.n)))
          acc = {
            a: acc.a.add(p.a).evaluate(),
            b: acc.b.add(p.b).evaluate(),
            n: acc.n,