I’m not sure what you mean by "o quinze em quadrinhospdf." I’ll choose a reasonable interpretation and proceed: assume you want an in-depth investigation of the phrase "o quinze em quadrinhos" (Portuguese for "the fifteen in comics") and its relation to a PDF (perhaps a document titled like that). I’ll cover possible meanings, historical and cultural contexts in Portuguese-language comics, likely sources/formats (including PDFs), and give concrete examples and search strategies to locate or create such a PDF. If you meant something else, say so.