use strict;
my $str = '<div class="my_class">
<div class="copy">
© 2018 Texto
</div>
</div>
<div class="my_class">
<h1>¿como estas?</h1>
<div class="copy">
© 2018 Texto
</div>
<script>
function hola(){
}
</script>
<style>
.red{
background-color: red;
}
</style>
';
my $regex = qr/<(script|style)[^>]*>[\s\S]*?<\/\1>|<\/?[^>]+>/mp;
my $subst = '';
my $result = $str =~ s/$regex/$subst/rg;
print "The result of the substitution is' $result\n";
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html