Question

1. $(2p^{2}+5p)+(p^{3}-7p)$

Explanation:

Step1: Remove parentheses

$2p^2 + 5p + p^3 - 7p$

Step2: Combine like terms

$p^3 + 2p^2 + (5p - 7p)$

Step3: Simplify the linear terms

$p^3 + 2p^2 - 2p$

Answer:

$p^3 + 2p^2 - 2p$