By distributing the minus sign into the parentheses, we get
[tex]-(-10h)-(-7w)[/tex]
By the law of signs for multiplication and division:
we have that
[tex]\begin{gathered} -(-10h)=+10h \\ and \\ -(-7w)=7w \end{gathered}[/tex]
So we have
[tex]10h+7w[/tex]
So the answer is: 10h+7w
