diff --git a/add.py b/add.py
index c2e197f..d6099a8 100644
--- a/add.py
+++ b/add.py
@@ -1,4 +1,6 @@
-a = 14;
-b = 30;
-a+b;
+
+b = 40;
+d = a+b;
+
+c = a - b
 
diff --git a/class.py b/class.py
index 60d4981..67c3fdf 100644
--- a/class.py
+++ b/class.py
@@ -1,3 +1 @@
 a=2
-b=6
-a=b
\ No newline at end of file
diff --git a/demo.py b/demo.py
index efd261b..e37853c 100644
--- a/demo.py
+++ b/demo.py
@@ -1 +1 @@
-demo
\ No newline at end of file
+demo file
diff --git a/test.py b/test.py
index 5cbe6cb..2bfc0e8 100644
--- a/test.py
+++ b/test.py
@@ -4,5 +4,5 @@
 
 
 
-b= 3;
-print(a+b)
\ No newline at end of file
+b= 39;
+print(a+b)