Using the Residues Theorem, calculate the following:
Integral limits between negative infinity and positive infinity [dx/(1+x^2)].
Please the file attached for the formula in its adequate notation.
See the attached pdf file for readability and the full breakdown of the solution with ...
Using the residues theorem over an appropriate contour in the complex plane we calculate the integral from minus infinity to plus infinity of the function 1/(1+x^2)