This is the 4030th most frequent Polish word.
wypróbuj
"Wypróbuj" means "try out" or "test."
In this sentence, 'Wypróbuj' is used as an imperative verb to suggest someone perform a test or trial of something, here referring to new recipes.
Wypróbuj nowe przepisy na ciasto.
Try out new recipes for cake.
In this instance, 'wypróbowali' is used in the past tense to describe the completed action of testing or applying different learning methods.
Oni wypróbowali różne metody nauki.
They tried out various learning methods.
Here, 'wypróbować' is used as an infinitive form indicating the act of testing or experimenting with the computer program.