Evaluate: `int(2tanx-3cotx)^2\ dx`

Explanation

To evaluate the integral \( \int (2 \tan x - 3 \cot x)^2 \, dx \), we can follow these steps:

### Step 1: Expand the Integrand
Using the identity \( (a - b)^2 = a^2 - 2ab + b^2 \), we expand the integrand:
\[ (2 \tan x - 3 \cot x)^2 = (2 \tan x)^2 - 2(2 \tan x)(3 \cot x) + (3 \cot x)^2 \]
This simplifies to:
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