Function functionOfExponentialQ

src/compute-engine/rubi/rubi-utils.ts:3369–3372

FunctionOfExponentialQ[u,x] — u is a function of F^v with an explicit * exponential present (not merely a hyperbolic).

(u: Expression, x: string)

  const newOps = ops.map((o) => cosLeafShiftRec(ce, o, x));
  if (newOps.every((o, i) => o === ops[i])) return e;
  return ce.function(e.operator, newOps);
}

/** Rubi DeactivateTrig standalone-cosine reflection as a full-tree LEAF rewrite:
 * when cosine (with a linear argument) is the SOLE x-dependent trig head, map
 * every `cos[e+f·x] → sin[e+π/2+f·x]` so the integrand routes to the sine
 * chapter (Rubi has no Cosine chapter). Generalizes `unifyInertTrig`'s