Function coeff

src/compute-engine/rubi/rubi-utils.ts:4443–4450

(args: Json[], ctx: Ctx)

        seed += 0.53;
      }
    }
    (e.ops ?? []).forEach(collect);
  };
  collect(F);
  sub[x] = 1.31;
  try {
    const v = F.subs(sub).N();
    if (!(isNumber(v) && v.isNumberLiteral)) return false;
    const re = v.re;
    const im = v.im ?? 0;
    return (