How to cut html tag from very large multiline text file with content with use perl, sed or awk?

Question

I want to transform this text (remove $.*?$) with sed, awk or perl:

{|
|-
| colspan=\"2\"|
: $[\backslash \backslash underbrace\{\backslash \backslash col$

Answer 1

If all data is so nicely formatted as in your example, then your solution is very close. I modified it only slightly

in AWK:

sub(/