Season 3 finds the team looking for Shiro while the Galra regroups under new leadership. It also turns out Shiro is alive and well, though he's held prisoner by the Galra. Shiro eventually escapes, though this is later revealed to be a ploy by his captors.
Then Shiro came back in episode five. After only two episodes with the new team in place, we cut to an episode that was totally focused on Shiro escaping from the Galra. After meeting up with some rebels Shiro eventually made his way back to the team, although he didn't resume command or pilot the Black Lion.
After disappearing from the Black Lion during a fight with Zarkon at the conclusion of the second season, Shiro returns after being presumably held captive by the Galra following the fight.
In season 2, Shiro died. The black lion's bond with him allowed it to keep his soul or mind or spirit or whatever inside of it rather than dying with the rest of his body.
It Shiro had been hit this way with a sword or knife being swung with tremendous force, it would have gone clear through his nose and across the other side of his face, giving him exactly the scar he has in the show.
Unfortunately, Shiro suffered a head injury from an explosion during his escape, which resulted in leaving him with amnesia as he fell into an escape pod destined for Earth. Following his team's latest battle against Zarkon, he suddenly vanishes without a trace from within the Black Lion's cockpit.
Zero. e raised to negative infinity is 1/e raised to infinity. That's 1/infinity which is zero.
@echo off prevents the prompt and contents of the batch file from being displayed, so that only the output is visible. The @ makes the output of the echo off command hidden as well.