Copied Using the residue calculus evaluate the integral \[ \int _{-\infty }^{\infty }\frac {1}{1+x^4}\,dx \] Raw LaTeX Using the residue calculus evaluate the integral \[ \int_{-\infty}^{\infty}\frac{1}{1+x^4}\,dx \] Topic Tags Cauchy Integral Theory and Morera's Theorem Complex Integration and Real Integral Evaluation Isolated Singularities and Residues