1. No category

(x1, y1)+(x2, y2) = (x1 + y1, x2 + y2)


                

    
            

            

                
                    
                     Download
                
                
                    
                     Report
                
            

            
        

    
                

            







        

    
    

            





    

        

            

                

                    

                        
Paperzz.com

                        
                    

                    

                                                    

                                
                            

                                            

                    

                        
Your Paperzz

                        
                    

                

            

        


        

            
                
            
        


        

            

                

                    

                        

                            © Copyright 2026 Paperzz