how bad is an error in the essays?

So here is the problem: I was just looking over the essays I submitted, and just noticed that I forgot to delete a 'blah' in the essay. I put the 'blah' in there as a place holder, but apparently didn't remember to delete it when I submitted the essay.

Not sure how serious the problem is. Any advice?

May be it is serious, may be it is not.

The point is there is no way that you can change it.

I think it is not a big deal, if it is just one "blah"...

No need to cry over spilled milk. Forget about it~

Take it easy.  I had spelling errors in my essays too.