Update app.py

app.py

@@ -33,7 +33,13 @@ if selected_function == "因数分解":
     expression = st.text_input("因数分解する式を入力してください:")
     if expression:
         factored_expression = factor(expression)
-        st.success(f"因数分解結果: {factored_expression.subs(user_defined_symbols)}")
+
+        # シンボルの代入
+        for symbol in user_defined_symbols:
+            factored_expression = factored_expression.subs(symbol, user_defined_symbols[symbol])
+
+        st.success(f"因数分解結果: {factored_expression}")
+
 
 # 展開(Sympy)
 elif selected_function == "展開":