Indefinite Integration

\(x-\tan x+\mathrm{c}\), where \(\mathrm{c}\) is a constant of integration

\(\frac{1}{x}-\tan \left(\frac{1}{x}\right)+\mathrm{c}\), where \(\mathrm{c}\) is a constant of integration.

\(\frac{1}{x}+\tan \left(\frac{1}{x}\right)+\mathrm{c}\), where \(\mathrm{c}\) is a constant of integration.

\(x+\tan x+\mathrm{c}\), where \(\mathrm{c}\) is a constant of integration.