3 9 - 4

It looks like you are performing a subtraction operation. Let's break it down step by step.

You have:

  3 9
-  4

This can be interpreted as the number 39 (which can be read as "three nine") minus 4.

Now, let's perform the subtraction:

  39
-  4
-----
  35

Therefore, 39 minus 4 equals 35.

If you meant something different, please clarify!