The expression is:

$-(x^2 - 4x + 1) - (2x^2 + 9)$

Let's simplify it step by step.

1. First, distribute the negative signs: $-x^2 + 4x - 1 - 2x^2 - 9$

2. Combine like terms:

   • The $x^2$ terms: $-x^2 - 2x^2 = -3x^2$
   • The constant terms: $-1 - 9 = -10$

So, the simplified expression is:

$-3x^2 + 4x - 10$

Would you like further details or clarifications?

Here are some related questions:

1. How would you factor a quadratic expression like this one?
2. Can you solve $-3x^2 + 4x - 10 = 0$?
3. What is the vertex of the quadratic function $-3x^2 + 4x - 10$?
4. How do you find the axis of symmetry for a quadratic equation?
5. What are the properties of parabolas when the coefficient of $x^2$ is negative?

Tip: When combining like terms, always ensure you are working with the same variable or constant values to avoid mistakes.