Answer
$y=\frac{x^{3}-3x+C}{3(x-1)}$
Work Step by Step
$(x-1)y'+y=x^{2}-1$
$y'+(\frac{1}{x-1})y=x+1$
Integrating factor: $e^{\int[\frac{1}{x-1}]dx}=e^{ln|x-1|}=x-1$
$y(x-1)=\int(x^{2}-1)dx=\frac{1}{3}x^{3}-x+C_{1}$
$y=\frac{x^{3}-3x+C}{3(x-1)}$