Update app.py

app.py

@@ -1,27 +1,39 @@
 import streamlit as st
+import numpy as np
+import math
+
+st.set_page_config(page_title="🧮 Advanced Calculator", layout="centered")
+
+st.title("🧠 Advanced Calculator")
+st.markdown("Perform advanced mathematical calculations securely and interactively.")
+
+expression = st.text_input("Enter your expression (e.g., sin(30) + log(10) + 2^3):")
+
+# Safe math function map
+allowed_names = {
+    k: v for k, v in math.__dict__.items() if not k.startswith("__")
+}
+allowed_names.update({
+    'np': np,
+    'sqrt': np.sqrt,
+    'pow': pow,
+    'abs': abs
+})
+
+def evaluate_expression(expr):
+    try:
+        # Replace ^ with ** for Python syntax
+        expr = expr.replace("^", "**")
+        result = eval(expr, {"__builtins__": {}}, allowed_names)
+        return result
+    except Exception as e:
+        return f"❌ Error: {e}"
+
+if expression:
+    result = evaluate_expression(expression)
+    st.subheader("🧾 Result:")
+    st.code(result, language='text')
+
+st.markdown("---")
+st.caption("Built using Streamlit | © 2025 AdvancedCalc")
 
-# Title
-st.title("🧮 Simple Calculator")
-
-# User inputs
-num1 = st.number_input("Enter first number", value=0.0)
-num2 = st.number_input("Enter second number", value=0.0)
-
-# Operation selection
-operation = st.selectbox("Select operation", ["Add", "Subtract", "Multiply", "Divide"])
-
-# Perform calculation
-if st.button("Calculate"):
-    if operation == "Add":
-        result = num1 + num2
-    elif operation == "Subtract":
-        result = num1 - num2
-    elif operation == "Multiply":
-        result = num1 * num2
-    elif operation == "Divide":
-        if num2 == 0:
-            st.error("❌ Cannot divide by zero.")
-        else:
-            result = num1 / num2
-    if operation != "Divide" or num2 != 0:
-        st.success(f"Result: {result}")