To add or subtract expressions, expand them to make their denominators the same. Least common multiple of $y+1$ and $2\left(y+1\right)$ is $2\left(y+1\right)$. Multiply $\frac{3}{y+1}$ times $\frac{2}{2}$.
Since $\frac{3\times 2}{2\left(y+1\right)}$ and $\frac{5}{2\left(y+1\right)}$ have the same denominator, subtract them by subtracting their numerators.
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of $y+1$ and $2\left(y+1\right)$ is $2\left(y+1\right)$. Multiply $\frac{3}{y+1}$ times $\frac{2}{2}$.
Since $\frac{3\times 2}{2\left(y+1\right)}$ and $\frac{5}{2\left(y+1\right)}$ have the same denominator, subtract them by subtracting their numerators.
