Standard quality grammar books and documents available for Portuguese translation.

I have a text (5000 words) translated by an automatic translator and then corrected. This document is supposed to be for a submission request that was rejected, because they were able to tell the difference between a machine translation device and a redaction of hand-typed Portuguese translations done by a local Portuguese speaker and translator. I need someone whose native language is Portuguese to review it and correct any errors that may include: bad grammar, incorrect sentences, misused clauses, prefixes, phrases, verbs, nouns, etc. (wrong word used) etc. If something looks "ugly ", I need you to make it look good. The goal is that the final text (after editing) looks like it was written by a native Portuguese. The original text is not included (original language), but the text you receive should be very simple and you should (if something doesn't make sense) be able to see what to write based on the context. You don't need to report every highlight the changes you've made; just make the changes and reload the file after you've done your part. I can easily see what changes have been made. You may have over 1000 of these ready to go because it is organization paperwork that is submitted for mutual agreement with various partner companies.