Update app.py

app.py

@@ -144,10 +144,9 @@ with col1:
         unsafe_allow_html=True
     )
     
-    # Use text input for the user to define a function
+    # Use text input for the user to define a function, but no `value` argument
     func_input = st.text_input(
         "Enter a function of 'x':", 
-        st.session_state.func_input, 
         key="func_input", 
         on_change=reset_state
     )