diff --git a/index.js b/index.js
index e69de29bb..d5872ca65 100644
--- a/index.js
+++ b/index.js
@@ -0,0 +1,35 @@
+function add() {
+}
+function subtract() {
+}
+function multiply() {
+}
+function divide() {
+}
+function add(a,b) {
+  return a + b
+}
+function subtract(a, b) {
+  return a - b
+}
+function multiply(a,b) {
+  return a * b
+}
+function divide(a,b) {
+  return a / b
+}
+function increment(n) {
+  return n += 1
+}
+function decrement(n) {
+  return n -= 1
+
+}
+
+function makeInt(string) {
+  return parseInt(string, 10)
+}
+
+function preserveDecimal(string) {
+  return parseFloat(string)
+}