It seems that the image you've provided is a math question asking to evaluate and simplify the following expressions:

1. $P(x) + Q(x)$
2. $Q(x) - U(x)$

To proceed, I'll need the specific definitions of $P(x)$, $Q(x)$, and $U(x)$ in order to evaluate and simplify these expressions. Could you provide those functions, or describe if they are given elsewhere in your problem set?

Feel free to upload additional information or clarify further!