-4+x

The expression \(-4 + x\) represents a mathematical equation where \(x\) can take any value. If you are looking to solve for \(x\) or simplify the expression, we might need more information.

For example, if you set the equation equal to a number (say 0), it would become:

\[ -4 + x = 0 \]

To solve for \(x\), you can add 4 to both sides:

\[ x = 4 \]

Please provide additional context or specify what you would like to do with the expression!