Is there a way to do this? When I select the problems in Adobe Reader and paste in Word, it gives some kind of text code, not the vector image problem.

I don't know what a vector image is, but using Foxit Reader, you can make a snapshot of one or several of the problems and then paste it into Word.

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Patience, grasshopper.

now it occured to me - either you can get a bitmap image as daal suggests, or the text code you already got. there is probably no straightforward way to get a vector image, because the pdfs were created using latex and a special go font -> therefore, it is a text code

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Spilling gasoline feels good.

I might be wrong, but probably not.

Then how exactly did the diagram were created? The reason is that I want to create a small booklet 1/4 of A4 papersize with my own bookbinding of choice (like a small pocket book), and I really like the diagram style in Tasuki, but not Drago zoom in the corner.

1/4 of A4 is A6. You want pages of A6 size? I have PDfs for A5, A6 and I think even A7 booklets. Let me know which book you want to try your hand at first (not to overload this post sending too many files). The files are prepared for fold-binding, only one signature.

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Geek of all trades, master of none: the motto for my blog mostlymaths.net