How do you simplify 3/(x+2) + 6/(x-1)?

$\frac{9 x + 9}{\left(z + 2\right) \left(x - 1\right)}$
3/(x+2)+6/(x−1)
$\frac{3 \left(x - 1\right) + 6 \left(x + 2\right)}{\left(z + 2\right) \left(x - 1\right)}$
$\frac{3 x - 3 + 6 x + 12}{\left(z + 2\right) \left(x - 1\right)}$
$\frac{9 x + 9}{\left(z + 2\right) \left(x - 1\right)}$