Either you skipped a couple of grades between 4 and 12, or your math is not so good, or you just post whatever floats through your mind at the time. Which is it?
If you skipped, then go back and learn something this time around.
If your math is not so good, then go back and learn something this time around.
If you just post whatever floats through your mind at the time, then at least you know your place as an example in the fight against ignorance.