var userInput = "five plus five equal to ten multiply 5";

const punctLists= {name: 'star', tag: '*'},
                      {name: 'bracket', tag: ')'},
                      {name: 'multiply', tag: '*'},
                      {name: 'plus', tag: '+'},
                      {name: 'double equals', tag: '=='},
                       {name: 'equal', tag: '='}]
     var matchPunction = punctLists.find( tag => tag.name == userInput);
     if(matchPunction){
      text=matchPunction.tag;
     }

var userInput = "5+5 = 10*5";