diff --git a/public/client.js b/public/client.js
index 1c60f86..8cf1c88 100644
--- a/public/client.js
+++ b/public/client.js
@@ -197,4 +197,4 @@ function setLoading(loading) {
     for (var i = 0; i < buttons.length; i++) {
         buttons[i].disabled = loading;
     }
-}
+}
\ No newline at end of file
diff --git a/public/index.html b/public/index.html
index 400c454..79085ff 100644
--- a/public/index.html
+++ b/public/index.html
@@ -40,7 +40,10 @@
             <button class="btn" onClick="operationPressed('+')">+</button>
             <button class="btn" onClick="equalPressed()">=</button>
 
-            <!-- TODO: Buttons -->
+            <!-- add a button for a power (or exponential) function -->
+            <button class="btn" onClick="operationPressed('^')">^</button>
+
+            
           </div>
         </div>
       </div>