text: const express = require("express");
  
  const app = express();
  
  app.get("/", (req, res) => {
    res.send({ message: "Hello", change: "here" }).status(200);
  });
  
  app.get("/add/:number/:additor", (req, res) => {
    const result = parseInt(req.params.number, 10) + parseInt(req.params.additor, 10);
    res.send({ result }).status(200);
  });
  
  app.get("/substract/:number/:substractor", (req, res) => {
    const result = parseInt(req.params.number, 10) - parseInt(req.params.substractor, 10);
    res.send({ result }).status(200);
  });
  
  module.exports = app;
  