changed home page and added topics on the website also added them in navbar only shows when signed in

app.py

@@ -78,6 +78,22 @@ def home():
 def bivariate():
     return render_template('bivariate.html')
 
+@app.route('/simultaneousequations')
+@login_required
+def simultaneousequations():
+    return render_template('simultaneousequations.html')
+
+@app.route('/calculus')
+@login_required
+def calculus():
+    return render_template('calculus.html')
+
+@app.route('/triganometry')
+@login_required
+def triganometry():
+    return render_template('triganometry.html')
+
+
 @app.route('/about')
 def about():
     return render_template('about.html')