Multiline equations within parentheses

Question

I have two equations which need to be broken into multiple lines. One of the equations has a coeficiente factored out, so that it is of the form X = A(...very long...). The other does not.

The equations were written as

$\!\begin{aligned} 
    y &= \frac{1}{A}\left(\frac{b_1\cdot{}t_{f1}^2}{2}+h_w\cdot{}t_w\left(t_{f1}+\frac{h_w}{2}\right)+\right.\\
    &\phantom{=}\left.+b_2\cdot{}t_{f2}\left(t_{f1}+h_w+\frac{t_{f2}}{2}\right)\right)\\
    I_y &= \dfrac{1}{12}\left(b_1\cdot{}t_{f1}^3+t_w\cdot{}h_w^3+b_2\cdot{}t_{f2}^3\right)+\\
    &\phantom{=}+b_1\cdot{}t_{f1}\left(y-\dfrac{t_{f1}}{2}\right)^2+\\
\end{aligned}$

The use of $\!\begin{aligned} instead of a standard align environment is because this is contained within a table. This results in the following output:

This is fine and is as expected. However, the global parentheses in the first equation required the use of \right. and \left. at the end of the first line and beginning of the second line, which seems to eat the space between the + and b, as becomes clear when you compare the space between them in the first and second equations.

This is a purely aesthetic issue, but I'm curious to know if it is (preferably trivially) solved.