Function reciprocalToPower

src/compute-engine/rubi/rubi-utils.ts:2652–2658

(
  ce: ComputeEngine,
  e: Expression
)

): Expression {
  if (x === undefined) return mapTrigHeads(ce, e, TO_INERT);
  const walk = (u: Expression): Expression => {
    const ops = u.ops;
    if (!ops || ops.length === 0) return u;
    const newOps = ops.map(walk);
    let head = u.operator;
    if (TO_INERT[head] !== undefined && ops.length === 1) {
      const arg = ops[0];
      const deg = polyDegreeX(arg, x);
      // Leave ACTIVE only a composite argument whose substitution / completing-
      // the-square reduction lands a VERIFYING closed form: