Evaluate:

$\displaystyle {\left|{y}\right|}$ when $\displaystyle {y}=-{30}$ 

$\displaystyle {\left|-{y}\right|}$ when $\displaystyle$ $\displaystyle {y}=-{29}$ 

$\displaystyle -{\left|{y}\right|}$ when $\displaystyle {y}={48}$ 

$\displaystyle -{\left|{y}\right|}$ when $\displaystyle {y}=-{20}$