LaCasaDePapel

hi! im in front of $t**** variable using p** sl v0.9.9 but i have no idea how to extract something useful, i don’t know how to execute anything, using the command "sh" i can see the code of that variable but i’ve googled all night long but nothing;
i don’t want any hint, just some good guy who can tell me where to study to comprend this ABOMINATION.