Regexen problems? Well the rule is that it will work really really hard to find a match. So figure out why it is finding the unwanted match and deny it.

Well on the second substitution it is clearly able to match "0+" after a 1. Well does that fit the rule? Why yes, the preceeding "1" is not "^", so it can match What to do? Why deny it a digit there. That gives us: 

s/(?<![\^\d])(?:\d+\+)//g;
#     ^^^^^^ <- was just \^ before

[download]
which does what you asked.

In reply to Re (tilly) 1: my substitution problem: by tilly
in thread my substitution problem: by Madams

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