using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^\([^|)]+\|[^)]+\) *\+ ?| \+? *\([^|)]+\|[^)]+\)";
string substitution = @"";
string input = @"y ~ 1 + a + (b | c) + (d^2) + e + (1 | f) + g
y~1+a+(b|c)+(d^2)+e+ (1|f)+g
(b | c) + y ~ 1 + a + (d^2) + e + (1 | f) + g
y ~ 1 + a + (d^2) + e + (1 | f) + g + (b | c)
(h|i) + y ~ 1 + a + (b | c) + (d^2) + e + (1 | f) + g +(j+k| m)";
RegexOptions options = RegexOptions.Multiline;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx