Solve the equation `tan^(-1)2x+tan^(-1)3x=pi/4`

Explanation

To solve the equation \( \tan^{-1}(2x) + \tan^{-1}(3x) = \frac{\pi}{4} \), we can follow these steps:

### Step 1: Use the formula for the sum of inverse tangents
We know that:
\[ \tan^{-1}(a) + \tan^{-1}(b) = \tan^{-1}\left(\frac{a + b}{1 - ab}\right) \]
for \( ab < 1 \). Here, let \( a = 2x \) and \( b = 3x \).
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