Tìm nguyên hàm: J=∫x lnx-1 / x+1dx

A. $\frac{1}{2}{x}^2\ln \frac{x-1}{x+1}-2\ln \left|x+1\right|+2\frac{1}{x+1}+C$

B.$\frac{1}{2}{x}^2\ln \frac{x-1}{x+1}+12\ln \left|x+1\right|-\frac{1}{x+1}+C$

D. Đáp án khác