Matching open parenthesis outside double or single quotes.md

# Matching open parenthesis outside double or single quotes.md
# Copyright (c) 2019 Evandro Coan
# 
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1. Open and close parenthesis expressions outside single and double quotes:

   ".*?"(*SKIP)(?!)|(?<!\w)'.*?'(?!\w)(*SKIP)(?!)|(?:\()(?!\s|\))
   ".*?"(*SKIP)(?!)|(?<!\w)'.*?'(?!\w)(*SKIP)(?!)|(?<!\s|\()(?:\))

   1. https://regex101.com/r/OFeXIh/1/
   2. https://stackoverflow.com/questions/26003778/can-regex-match-all-the-words-outside-quotation-marks

   Now, not matching open and close parenthesis preceded by def and neither inside triple single or double quotes:

   (?s)".*?"(*SKIP)(?!)|(?<!\w)'.*?'(?!\w)(*SKIP)(?!)|(?s)""".*?"""(*SKIP)(?!)|(?<!\w)'''.*?'''(?!\w)(*SKIP)(?!)|def[^(]*\((*SKIP)(*F)|(?:\()(?!\s|\))
   (?s)".*?"(*SKIP)(?!)|(?<!\w)'.*?'(?!\w)(*SKIP)(?!)|(?s)""".*?"""(*SKIP)(?!)|(?<!\w)'''.*?'''(?!\w)(*SKIP)(?!)|def[^)]*\)(*SKIP)(*F)|(?<!\s|\()(?:\))

   Now, and no class word:

   (?s)".*?"(*SKIP)(?!)|(?<!\w)'.*?'(?!\w)(*SKIP)(?!)|(?s)""".*?"""(*SKIP)(?!)|(?<!\w)'''.*?'''(?!\w)(*SKIP)(?!)|(?:def|class)[^(]*\((*SKIP)(*F)|(?:\()(?!\s|\))
   (?s)".*?"(*SKIP)(?!)|(?<!\w)'.*?'(?!\w)(*SKIP)(?!)|(?s)""".*?"""(*SKIP)(?!)|(?<!\w)'''.*?'''(?!\w)(*SKIP)(?!)|(?:def|class)[^)]*\)(*SKIP)(*F)|(?<!\s|\()(?:\))

   1. https://regex101.com/r/ec0FgD/3
   2. https://stackoverflow.com/questions/50649369/how-to-properly-use-char-negation-to-do-word-non-fixed-width-backward-lookb

2. Match everything all the lines which does not has the word c=50 and does not has anything on the form c=\d\d:

   c=50(*SKIP)(*F)|c=\d\d

   1. https://regex101.com/r/fCdsOE/1
   2.