Question: "What is the value of $\tan(\sum_{n=1}^{\infty} \tan^{-1}(\frac{1}{1 + n + n^2}))$" | TestX

Loading Question: "What is the value of $\tan(\sum_{n=1}^{\infty} \tan^{-1}(\frac{1}{1 + n + n^2}))$" | TestX...