Convert a .nb file saved as pdf to the original file format?

emalik (Ebaad Malik) November 20, 2016, 8:24pm 1

I somehow messed up my .nb file while saving it as a pdf and currently struggling to convert it back or reverting back to a saved version if its possible.
Attached is my file. Any help will be appreciated.

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Convert a .nb file saved as pdf to the original file format?

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