There's an old joke about if you write code as cleverly as you are able, then you won't be clever enough to debug and maintain it.

I sometimes code out "in long' if I feel it is necessary. That is, I deliberately add extra lines to 'show my working'. As in, perhaps:

         variable = foo( bar( baz( stuff )));

might possibly be laid out as

         bazzed = baz ( stuff );   /* comment one */
         barred = bar ( bazzed );   /*comment two */
         variable = foo ( barred );   /*comment three */

to show how and why a particular result is generated, if I feel the original code is too abstruse to see quickly why it is so.

Yes, there is a (usually) negligible time cost in the running of the program that might even be fixed by an optimising compiler. But I will save a lot more time than that for myself and any other programmer in the future when maintenance time comes around.