It seems like your input might have been partially mixed up or incomplete. However, from what I can infer, you might be working with an equation or expression involving variables like $h$, $t$, and $d$, and you want to find $D$.

Could you please clarify the equation or expression you're dealing with? If you meant something like:

$-h + \frac{5}{t}d = f$

and you're trying to solve for $D$, or something else, please provide more details.

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Do you want details or have any questions? Here are some related questions you might consider:

1. What are the values of $h$, $t$, and $d$ in the equation?
2. Are you trying to solve for $D$ or another variable like $f$?
3. Is this equation part of a larger system of equations?
4. Do you need help with understanding how to isolate a variable in an equation?
5. Is there a specific context or application for this equation, like physics or economics?

Tip: When solving equations, clearly define each variable and ensure the equation is correctly written to avoid confusion.