Evaluate: `int(tanx)/(a+btan^2x)\ dx`

Explanation

To evaluate the integral \( \int \frac{\tan x}{a + b \tan^2 x} \, dx \), we can follow these steps:

### Step 1: Rewrite the integral
We start by rewriting \( \tan x \) in terms of sine and cosine:
\[ \tan x = \frac{\sin x}{\cos x} \]
Thus, we can rewrite the integral as:
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