Evaluate: `intcot^4x\ dx`

Explanation

To evaluate the integral \( \int \cot^4 x \, dx \), we can follow these steps:

### Step 1: Rewrite the Integral
We start by rewriting \( \cot^4 x \) in a more manageable form:
\[ \cot^4 x = \cot^2 x \cdot \cot^2 x \]
Using the identity \( \cot^2 x = \csc^2 x - 1 \), we can express \( \cot^4 x \) as:
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