# Collecting like terms

Remember that any term containing the same letter can be combined by adding and subtracting.

So:

Like terms that include powers can only be added or subtracted if the powers are the same. Like terms with different powers cannot be added or subtracted.

## Example

Simplify:

### Solution

Rearrange the expression so that like terms with the same powers are next to each other:

And then simplify:

We usually write the expression with the term first, then the term, and finally the number term.

Question

Simplify:

To get the answer, rearrange the expression:

and then simplify: