try not or do not try?

Why not take the elevator? climbing the stairs will fatigue you.

I wonder what is the subject of the clause?

In addition:

Are these the same?

I try not to make errors.

I do not try to make errors.

Moreover, when usually do you prefer to use the following structure(S) like above?

VERB+NOT+ TO VERB

Solution 1:

I try not to make errors.

I do not try to make errors.

These are subtly different.

The first implies that you are putting effort towards not making errors.

The second implies that you are putting no effort towards making errors.

In general, the first is probably what you mean.