We are given the following expressions
[tex](-4+2)+(2p+x+3)[/tex]Let us add the above expressions.
We need to re-group the like terms together as shown below
[tex]\begin{gathered} (-4+2)+(2p+x+3) \\ -4+2+2p+x+3 \\ (-4+2+3)+(2p+x) \end{gathered}[/tex]Now simplify the expression
[tex]\begin{gathered} (-4+2+3)+(2p+x) \\ (-4+5)+(2p+x) \\ (-1)+(2p+x) \\ -1+2p+x \\ 2p+x-1 \end{gathered}[/tex]Therefore, the simplified expression is
[tex]2p+x-1[/tex]