The topic Algebraic expressions is actually about
changing the form
of algebraic expressions. Most of the time, this involves writing an
expression in a shorter, more concise way (simplifying). But not always.
Sometimes an expression will be more useful to us in a different form,
even if the new form does not look any shorter or more concise. Don't worry,
this will start to make sense as you work your way through the course.

What's the difference between a TERM and an EXPRESSION?

A TERM is either a number, a letter or a combination of a number and
letter(s) multiplied together
(or divided).