Exercise 1: my first exercise

Here goes a general introduction to the exercise.

Begin-end directive Behavior
!bsubex - !esubex Subexercise
!bans - !eans Answer
!bsol - !esol Solution
!bhint - !ehint Hint

aaaa

Commands Behavior
=== Exercise/Example/..: .. === Header with Exercise, Problem, Project, or Example title
file= Answer file
files= Answer files, comma separated
solution= Solution file

aaaa

Command option Behavior
--without_answers Turn off output of answers
--without_solutions Turn off output of solutions
--answers_at_end Answers in the end of the document
--solutions_at_end Solutions in the end of the document

/