"podem conseguir"... is it not similar enough to "conseguem realizar"?
I think "podem conseguir" so weird. Just "eles conseguem tudo" works better. "Podem conseguir" is likely a possible action "they may/might get..." your option (conseguem realizar) works better :)
"Eles conseguem tudo" is exactly what I wrote, but DL didn't accept my answer.
Eles podem realizar todos?
Nop... everything = tudo. Todos = all (+ complement), everybody
"Eles podem realizam qualquer coisa."
Just horribly wrong? Or can I get some dignity with this sentence?
when you have two verbs, you conjugate just the first one:
What about "Eles podem lograr tudo"? I was marked wrong.
"lograr" is rarely used.