# The Expand Command

The **Expand** command is used to change an expression to an expanded form. For
example, **Expand** applied to the expression x*(y + 1) give x* y + x. This command typically
just modifies the highlighted term. The keystroke for the **Expand** command is the
"*e*" key.

In addition to simple expansions of algebraic expressions, for example:

the expand command works on a number of other expressions, including:

- Roots:
- Absolute value:
- Summation:
(in this case, the expand command has been used several times in a row)

- Trig functions:
- Derivatives and integrals: