using System.Text.RegularExpressions;

public static class ClipboardFusionHelper
  {
    public static string ProcessText(string text)
      {
        text = Regex.Replace(text,
        @"(https?://www\.google\.[a-z.]+/search)(?(?=\?tbm=)(\?(tbm=[^&\s]*).*?(&q=[^&\s]*))|((?=.*?[?&](q=[^&\s]*))(?=.*?(&tbm=[^&\s]*))*))[a-zA-Z0-9-_./~*%$@:;,!?&=+#]*",
        "$1?$2$3$5$6");
        text = Regex.Replace(text,
        @"(https?://maps\.google\.[a-z.]+/maps)(?(?=\?q=)(\?(q=[^&\s]*)(?=.*?(&(?:s?ll|z|t)=[^&\s]*))*)|((?=.*?[?&](q=[^&\s]*))(?=.*?(&(?:s?ll|z|t)=[^&\s]*))*))[a-zA-Z0-9-_./~*%$@:;,!?&=+#]*",
        "$1?$2$3$5$6");
        text = Regex.Replace(text,
        @"(https?://www\.youtube\.com/watch).*?[?&](v=[^&\s]*)[a-zA-Z0-9-_./~*%$@:;,!?&=+#]*",
        "$1?$2");
        text = Regex.Replace(text,
        @"(https?://www\.amazon\.[a-z.]+).*?(/(dp|gp/product|exec/obidos/ASIN)/[A-Z0-9]+)[a-zA-Z0-9-_./~*%$@:;,!?&=+#]*",
        "$1$2/");
        return text;
      }
  }