1. **State the problem:** Simplify the expression $-p + 10p - 4p + 4 - 5p$. 2. **Identify like terms:** The terms involving $p$ are $-p$, $10p$, $-4p$, and $-5p$. The constant term is $4$. 3. **Combine like terms:** $$-p + 10p - 4p - 5p = (-1 + 10 - 4 - 5)p = 0p = 0$$ 4. **Add the constant term:** $$0 + 4 = 4$$ 5. **Final answer:** The simplified expression is $4$. This means all the $p$ terms cancel out, leaving only the constant $4$.