Indefinite Integration

$\frac{1}{4} \log \left(\frac{1+x}{7-x}\right)+\mathrm{c}$, (where c is a constant of integration)

$\frac{1}{8} \log \left(\frac{7-x}{1+x}\right)+\mathrm{c}$, ( where c is a constant of integration)

$\frac{1}{4} \log \left(\frac{7-x}{1+x}\right)+\mathrm{c}$, (where c is a constant of integration)

$\frac{1}{8} \log \left(\frac{1+x}{7-x}\right)+\mathrm{c}$, (where c is a constant of integration)