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et15
I found myself developing various rules in my head with negatives versus division, etc. to solve these quicker without having to do most of the math. Interesting game, thanks for sharing!
alexeldeib
I did exactly the same, and got fairly high accuracy. Funny how we can use heuristics with a relatively high success rate more quickly than doing the math.
arsenide
Console program to auto solve:

  String.prototype.replaceAll = function(search, replacement) 
  {
      var target = this;
      return target.replace(new RegExp(search, 'g'), replacement);
  };

  function sleep (time) {
    return new Promise((resolve) => setTimeout(resolve, 
  time));
  }

  for (var i=0;i<100;i++) { sleep(i*2000).then(() => {
    if 
  (eval(document.getElementById("opt1").innerText.replaceAll("×", "*").replaceAll("÷", "/").replaceAll("−", "-")) > eval(document.getElementById("opt2").innerText.replaceAll("×", "*").replaceAll("÷", "/").replaceAll("−", "-")))
  {
      document.getElementById("opt1").click()
  } else {
	  document.getElementById("opt2").click()
  }
  })}