Write the inverse of each function.

Please show work and short explanation so I understand how to get the answers for the rest of my homework

1) $\displaystyle Y=2^{x/3}$

2) $\displaystyle Y=log_{5} X^2$

Also If I Need to solve for Y in the following what is the answer for the following (please show work):

$\displaystyle f(x)=log_4(x+4)-3$

$\displaystyle X= -2$