| 12
 3
 4
 5
 6
 7
 8
 9
 10
 11
 12
 13
 
 | function add(...args) {let parmas = args;
 function sum(){
 parmas = [...parmas,...arguments];
 return sum;
 }
 sum.sumOf = function(){
 return parmas.reduce((p,c)=>p+c);
 }
 return sum;
 }
 console.log(add(1)(2)(3)(10)(10, 20).sumOf())
 
 
 |