$$\frac{y+3}{y2+6y+9}+\frac{6}{y+9}-\frac{16y}{8y^{2}-24y}$$
$\frac{y^{3}+33y^{2}+4yy_{2}-189y-36y_{2}-405}{\left(y-3\right)\left(y+9\right)\left(6y+y_{2}+9\right)}$
$\frac{y^{3}+33y^{2}+4yy_{2}-189y-36y_{2}-405}{\left(y-3\right)\left(y+9\right)\left(6y+y_{2}+9\right)}$
