Find the antiderivative of functions by the method of inspection:`cos 3x-e^(2x)`

Explanation

To find the antiderivative of the function \( \cos(3x) - e^{2x} \) using the method of inspection, we can follow these steps:

### Step 1: Find the antiderivative of \( \cos(3x) \)

We know that the derivative of \( \sin(3x) \) is given by:
\[ \frac{d}{dx}(\sin(3x)) = 3\cos(3x) \]
...