diff --git a/App/App/src/main.cpp b/App/App/src/main.cpp
index 20f3d10..5f435cc 100644
--- a/App/App/src/main.cpp
+++ b/App/App/src/main.cpp
@@ -1,8 +1,24 @@
 #include "App.hh"
+#include "Math.hh"
 
+#include <iostream>
+
+using namespace std;
 
 int main(int argc, char const *argv[])
 {
-    App::App* app = new App::App();
-    return app->getReturnCode();
+    // App::App* app = new App::App();
+    // return app->getReturnCode();
+    Vector2 v1(1, 1.5);
+    Vector2 v2(3, -2);
+    Vector2 res = v1 + v2;
+    cout << res.x << ", " << res.y << endl;
+    res = v1 - v2;
+    cout << res.x << ", " << res.y << endl;
+    res = v1 * v2;
+    cout << res.x << ", " << res.y << endl;
+    res = v1 / v2;
+    cout << res.x << ", " << res.y << endl;
+
+    return 0;
 }
diff --git a/App/AppLib/include/AppLib/CowPtr.hh b/App/AppLib/include/AppLib/CowPtr.hh
new file mode 100644
index 0000000..a1088ea
--- /dev/null
+++ b/App/AppLib/include/AppLib/CowPtr.hh
@@ -0,0 +1,47 @@
+// Implementation from https://www.youtube.com/watch?v=9b9hWIH8-hE
+
+#include <memory>
+
+namespace Core {
+template<class T>
+class CowPtr
+{
+public:
+    explicit CowPtr(T* t) : content(t)
+    {
+    }
+
+    T& operator*()
+    {
+        detach();
+        return *content;
+    }
+    const T& operator*() const
+    {
+        return *content;
+    }
+
+    T* operator->()
+    {
+        detach();
+        return content.operator->();
+    }
+
+    const T* operator->() const
+    {
+        return content.operator->();
+    }
+
+    std::shared_ptr<T> content;
+    
+private:
+    void detach()
+    {
+        T* tmp = content.get();
+        if(!(tmp == 0 || content.unique()))
+        {
+            content = std::shared_ptr<T>(new T(*tmp));
+        }
+    }
+};
+}
\ No newline at end of file
diff --git a/App/AppLib/include/AppLib/Math.hh b/App/AppLib/include/AppLib/Math.hh
index b5d43b8..7c2179b 100644
--- a/App/AppLib/include/AppLib/Math.hh
+++ b/App/AppLib/include/AppLib/Math.hh
@@ -8,6 +8,23 @@ namespace Core
     class Vector2
     {
     public:
+        Vector2();
+        Vector2(float x, float y);
+
+        Vector2 operator+(Vector2 const& other);
+        Vector2 operator-(Vector2 const& other);
+        Vector2 operator*(Vector2 const& other);
+        Vector2 operator/(Vector2 const& other);
+        Vector2 operator+=(Vector2 const& other);
+        Vector2 operator-=(Vector2 const& other);
+        Vector2 operator*=(Vector2 const& other);
+        Vector2 operator/=(Vector2 const& other);
+
+        bool operator==(Vector2 const& other);
+        bool operator!=(Vector2 const& other);
+
+        Vector2 operator*(float const& scalar);
+
         float x;
         float y;
     };
@@ -18,7 +35,21 @@ namespace Core
         float x;
         float y;
         float z;
-        float w = 1;
+        float w;
+
+        Vector3 operator+(Vector3 const& other);
+        Vector3 operator-(Vector3 const& other);
+        Vector3 operator*(Vector3 const& other);
+        Vector3 operator/(Vector3 const& other);
+        Vector3 operator+=(Vector3 const& other);
+        Vector3 operator-=(Vector3 const& other);
+        Vector3 operator*=(Vector3 const& other);
+        Vector3 operator/=(Vector3 const& other);
+
+        bool operator==(Vector3 const& other);
+        bool operator!=(Vector3 const& other);
+
+        Vector3 operator*(float const& scalar);
     };
 
 } // namespace Core
diff --git a/App/AppLib/src/Math.cpp b/App/AppLib/src/Math.cpp
index 399f5ff..63280b9 100644
--- a/App/AppLib/src/Math.cpp
+++ b/App/AppLib/src/Math.cpp
@@ -2,4 +2,32 @@
 
 namespace Core
 {
+    Vector2::Vector2() : x(0), y(0)
+    {
+    }
+
+    Vector2::Vector2(float x, float y) : x(x), y(y)
+    {
+    }
+
+    Vector2 Vector2::operator+(Vector2 const &other)
+    {
+        return Vector2(this->x+other.x, this->y+other.y);
+    }
+
+    Vector2 Vector2::operator-(Vector2 const &other)
+    {
+        return Vector2(this->x-other.x, this->y-other.y);
+    }
+
+    Vector2 Vector2::operator*(Vector2 const &other)
+    {
+        return Vector2(this->x*other.x, this->y*other.y);
+    }
+
+    Vector2 Vector2::operator/(Vector2 const &other)
+    {
+        return Vector2(this->x/other.x, this->y/other.y);
+    }
+
 } // namespace Core
\ No newline at end of file