title: BigInteger +- operations?
body: <p>is it possible to do +- operations like this somehow?</p>
  
  <pre><code>BigInteger a = new BigInteger("1");
  BigInteger b = new BigInteger("2");
  BigInteger result;
  
  a+=b;
  //result = a.add(b);
  </code></pre>
  
  <p>ty</p>