It looks like you have an expression that may have a typo. Let's separate and simplify the expression you provided.

You wrote:

\(9x + 4x - 2x^2\) and then seemed to continue with \(29x + 4x - 2x^2\).

Assuming you meant to combine like terms, it would help to clarify the expression.

Let's simplify \(9x + 4x - 2x^2\) first:

1. Combine the \(x\) terms:
\[
9x + 4x = 13x
\]

2. The expression becomes:
\[
13x - 2x^2
\]

If you meant a different expression, could you clarify it? Otherwise, that's the simplified version of the expression you've provided.