Evaluate: $y=-1$ in $y=\frac{\left(x^2+1\right)}{x}$

Evaluate: $y=8$ in $y=\frac{2}{x}$

Evaluate: $y=2$ in $y=\frac{\left(x+1\right)}{\left(x-1\right)}$

Evaluate: $y=3$ in $y=\frac{1}{x}$

Evaluate: $y=1$ in $y=\frac{\left(x^2+1\right)}{x}$

Evaluate: $y=0$ in $y=\frac{\left(2x+1\right)}{\left(2x-1\right)}$

Evaluate: $y=4$ in $y=\ \frac{\left(x+1\right)}{\left(x-1\right)}$

Evaluate: $y=1$ in $y=\frac{\left(2x+1\right)}{\left(2x-1\right)}$

Evaluate: $y=2$ in $y=\frac{2}{x}$

Evaluate: $y=0$ in $y=\frac{\left(x+1\right)}{\left(x-1\right)}$