Evaluate `int(secx)/((secx+tanx)) dx`.

Explanation

To evaluate the integral \( \int \frac{\sec x}{\sec x + \tan x} \, dx \), we can follow these steps:

### Step 1: Rewrite the Integral
We start with the integral:
\[ I = \int \frac{\sec x}{\sec x + \tan x} \, dx \]

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