Extract PDF Pages
Method 1
Simply print the pages you want as PDF. Most PDF viewers have this feature.
The problem with this solution is that the page dimensions may be altered.
Method 2
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Install
GhostScript
and run the following command$ gs -sDEVICE=pdfwrite -dNOPAUSE -dBATCH -dSAFER \ -dFirstPage=22 -dLastPage=36 \ -sOutputFile=outfile_p22-p36.pdf 100p-inputfile.pdf