text: actual = '';
  expected = '7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,';
  
  function heavy(s, t, u) {return eval(s)}
  
  for (var i = 0; i < 5; ++i) {
    var flat = heavy("(function () {var x = t * t; return function(){return x + u}})()", 2, 3);
    for (var j = 0; j < 5; ++j) {
      appendToActual(flat());
    }
   }
  
  
  assertEq(actual, expected)
  