Try using complex numbers

Calculus Level 2

\[\large \displaystyle\int\frac{1}{1+x^2}dx= \, ? \]

1 Impossible to determine \[\text{arctanh}(x)\] \[x^{\cos(x)}\] Doesn't exist \[\sinh(x)\] \[\text{arccosh}(x)\] \[\arctan(x)\]

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