What I want to be able to do: 
$x = '123'; $y = $x; $y =~ s/(2)/?{$1+1}/x; print $y

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with the result: 
133

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But instead I get the following: 
1?{2+1}3

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Is there a regex way to that? The best non-regex way?

In reply to perl code in regex replacement by Anonymous Monk

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