const p1 = () => {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve("p1")
    },3000)
  })
}

const p2 = () => {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve("p2")
    }, 5000)
  })
}

const p3 = () => {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      reject(new Error("Error en p3"))
    }, 2000)
  })
}


Promise.all([p1(), p2(), p3()])
  .then((mensaje) => console.log(mensaje))
  .catch(err => console.log(err))