$\displaystyle \frac{3}{2}$ $\displaystyle ln(x^2+1)-ln(x+1)-ln(x-1)$

I know that $\displaystyle ln\frac{a}{b}=lna-lnb$

But I don't know which part to divide first. Is there any way to know what part to divide first or is this somehow a trick question?

Thanks so much!!!