2х*+5

It seems like you've entered a mathematical expression, but it appears to have a typo. If you meant to write the expression \(2x^* + 5\), please clarify what the asterisk (*) is meant to indicate (for example, if it's meant to signify some operation or another variable).

If you were trying to write a polynomial or algebraic expression, it might be \(2x + 5\) or \(2x^2 + 5\). Please provide further clarification on what you're trying to express or calculate, and I'll be happy to help!