x2⋅(1+3lnx)x^{2} \cdot(1+3 \ln x)x2⋅(1+3lnx)
x(5+6lnx)x(5+6 \ln x)x(5+6lnx)
11+6lnx11+6 \ln x11+6lnx
6x\frac{6}{x}x6