added trailing semicolon to all function and module exports

calculator/calculator.js

@@ -1,26 +1,26 @@
 const add = function() {
 	
-}
+};
 
 const subtract = function() {
 	
-}
+};
 
 const sum = function() {
 	
-}
+};
 
 const multiply = function() {
 
-}
+};;
 
 const power = function() {
 	
-}
+};
 
 const factorial = function() {
 	
-}
+};
 
 module.exports = {
   add,
@@ -29,4 +29,4 @@ module.exports = {
   multiply,
   power,
   factorial
-}
+};