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*косметику :)

you can, theoretically
But it is a general rule not use two words with similar meaning together
спросить вопрос. Both words have the same root -прос-, comes from a word просить
So it will sound...

Just to clarify
прячу - I'm hiding (something)
прячусь - I'm hiding (myself)
буду прятать - I will hide (something)
буду прятаться - I will be hiding (myself)
спрячу - I'm going to hide...

Is it from a Chinese book? :)