function zero() {
  let result = 0
  if (arguments.length > 0) {
    result = new Function(`return 0 ${arguments[0]}`)()
  }
  return Math.floor(result)
}
zero.toString = function () { return 0 }
zero.valueOf = function () { return 0 }
function one() {
  let result = 1
  if (arguments.length > 0) {
    result = new Function(`return 1 ${arguments[0]}`)()
  }
  return Math.floor(result)
}
one.toString = function () { return 1 }
one.valueOf = function () { return 1 }
function two() {
  let result = 2
  if (arguments.length > 0) {
    result = new Function(`return 2 ${arguments[0]}`)()
  }
  return Math.floor(result)
}
two.toString = function () { return 2 }
two.valueOf = function () { return 2 }
function three() {
  let result = 3
  if (arguments.length > 0) {
    result = new Function(`return 3 ${arguments[0]}`)()
  }
  return Math.floor(result)
}
three.toString = function () { return 3 }
three.valueOf = function () { return 3 }
function four() {
  let result = 4
  if (arguments.length > 0) {
    result = new Function(`return 4 ${arguments[0]}`)()
  }
  return Math.floor(result)
}
four.toString = function () { return 4 }
four.valueOf = function () { return 4 }
function five() {
  let result = 5
  if (arguments.length > 0) {
    result = new Function(`return 5 ${arguments[0]}`)()
  }
  return Math.floor(result)
}
five.toString = function () { return 5 }
five.valueOf = function () { return 5 }
function six() {
  let result = 6
  if (arguments.length > 0) {
    result = new Function(`return 6 ${arguments[0]}`)()
  }
  return Math.floor(result)
}
six.toString = function () { return 6 }
six.valueOf = function () { return 6 }
function seven() {
  let result = 7
  if (arguments.length > 0) {
    result = new Function(`return 7 ${arguments[0]}`)()
  }
  return Math.floor(result)
}
seven.toString = function () { return 7 }
seven.valueOf = function () { return 7 }
function eight() {
  let result = 8
  if (arguments.length > 0) {
    result = new Function(`return 8 ${arguments[0]}`)()
  }
  return Math.floor(result)
}
eight.toString = function () { return 8 }
eight.valueOf = function () { return 8 }
function nine() {
  let result = 9
  if (arguments.length > 0) {
    result = new Function(`return 9 ${arguments[0]}`)()
  }
  return Math.floor(result)
}
nine.toString = function () { return 9 }
nine.valueOf = function () { return 9 }

function plus() {
  return '+ ' + Number(arguments[0])
}
function minus() {
  return '- ' + Number(arguments[0])
}
function times() {
  return '* ' + Number(arguments[0])
}
function dividedBy() {
  return '/ ' + Number(arguments[0])
}