Calculate: (6x^3+x^2+5x-1)/(x^3+x)

Expression: $\frac{6x^{3}+x^{2}+5x-1}{x^{3}+x}$

Divide $ \frac{6x^{3}+x^{2}+5x-1}{x^{3}+x}:{\quad}\frac{6x^{3}+x^{2}+5x-1}{x^{3}+x}=6+\frac{x^{2}-x-1}{x^{3}+x}$

$=6+\frac{x^{2}-x-1}{x^{3}+x}$