# Simple Yet Challenging Integration Problem

Calculus Level 4

Evaluate the Definite Integral: $$\int _{ 0 }^{ \pi /4 }{ \ln { (\tan { x+1) dx } } } .$$ The answer must be a decimal in terms of $$\pi$$. For example, if the answer is 2$$\pi,$$ then the answer should be 2.

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