Question Number 137538 by Mathspace last updated on 03/Apr/21
$${calculate}\:\int_{−\infty} ^{+\infty} \:\frac{\mathrm{2}{x}+\mathrm{1}}{\left({x}^{\mathrm{4}} −\mathrm{2}{x}^{\mathrm{2}} +\mathrm{3}\right)^{\mathrm{2}} } \\ $$
calculate-2x-1-x-4-2x-2-3-2-