1. **State the problem:** Simplify the expression $$\frac{5}{h} - 2h^2 - 6h + 15f$$ where $h$ and $f$ are variables. 2. **Understand the terms:** The expression contains a rational term $$\frac{5}{h}$$ and polynomial terms $$-2h^2$$, $$-6h$$, and $$15f$$. 3. **Simplification:** Since the terms involve different variables and powers, they cannot be combined further. The expression is already simplified. 4. **Final answer:** $$\frac{5}{h} - 2h^2 - 6h + 15f$$