- 28[tex]p^{5}[/tex] - 7[tex]p^{4}[/tex] + 7p³
distributing and adding exponents of like terms gives
- 28[tex]p^{3+2}[/tex] - 7[tex]p^{3+1}[/tex] + 7p³
= - 28[tex]p^{5}[/tex] - 7[tex]p^{4}[/tex] + 7p³
