Answer:
[tex]2h^2[/tex]
Step-by-step explanation:
=> [tex](10h^4+h^2)-(10h^4-h^2)[/tex]
=> [tex]10h^4+h^2-10h^4+h^2[/tex]
=> [tex]h^2+h^2[/tex]
=> [tex]2h^2[/tex]
