Fix f(x1) wording

templates/index.html

@@ -23,7 +23,7 @@
   <form action="/" method="POST">
     {% for i in range(polynomial.degree + 1) %}
     <div>
-      <input required type="number" name="x=x{{i+1}}" placeholder="x=x{{i+1}}">
+      <input required type="number" name="x{{i+1}}" placeholder="x{{i+1}}">
       <input required type="number" name="f(x{{i+1}})" placeholder="f(x{{i+1}})">
     </div>
     {% endfor %}