1. The problem is to express a given function or expression as an integral. 2. To express a function as an integral, we often use the definition of the integral or known integral formulas. 3. For example, if you want to express a function $f(x)$ as an integral, you might write it as $\int f(x) \, dx$ over a certain interval. 4. Without a specific function or expression given, the general form of expressing something as an integral is: $$\int f(x) \, dx$$ 5. Please provide the specific function or expression you want to express as an integral for a detailed solution.