diff --git a/QWERTYkez.WordProcessor/Extension.cs b/QWERTYkez.WordProcessor/Extension.cs
index 229efc7..3b602e2 100644
--- a/QWERTYkez.WordProcessor/Extension.cs
+++ b/QWERTYkez.WordProcessor/Extension.cs
@@ -28,4 +28,24 @@ internal static class Extension
             size.Width = new(h.Value);
         }
     }
+
+
+    /// <summary>
+    /// Возвращает индекс указанного элемента в коллекции.
+    /// </summary>
+    /// <param name="list">Коллекция элементов.</param>
+    /// <param name="element">Элемент для поиска.</param>
+    /// <returns>Индекс элемента, или -1, если элемент не найден.</returns>
+    public static int IndexOf(this OpenXmlElementList list, OpenXmlElement element)
+    {
+        if (list == null || element == null)
+            return -1;
+
+        for (int i = 0; i < list.Count; i++)
+        {
+            if (list[i] == element)
+                return i;
+        }
+        return -1;
+    }
 }
\ No newline at end of file
diff --git a/QWERTYkez.WordProcessor/IWordWriter.cs b/QWERTYkez.WordProcessor/IWordWriter.cs
index b664166..2fe8d3a 100644
--- a/QWERTYkez.WordProcessor/IWordWriter.cs
+++ b/QWERTYkez.WordProcessor/IWordWriter.cs
@@ -1,6 +1,4 @@
-using QWERTYkez.WordProcessor;
-
-namespace QWERTYkez.WordProcessor;
+namespace QWERTYkez.WordProcessor;
 
 public interface IWordWriter : IWordReader
 {
@@ -23,6 +21,25 @@ public interface IWordWriter : IWordReader
     void ReplaceToTable(string oldValue, Action<ITable> buildTable);
     void ReplaceToTable(string oldValue, FontProps baseFont, Action<ITable> buildTable);
     void ReplaceToText(string oldValue, Action<IText> buildText);
+
+
+
+
+    void ReplaceString(string oldValue, Func<string, string> newValues);
+    void ReplaceString(string oldValue, Func<string, IEnumerable<string>> newValues);
+    void ReplaceString(string oldValue, Func<string, string[]> newValues);
+
+    void ReplaceItem(string oldValue, Func<string, ReplaceItem> newValues);
+    void ReplaceItem(string oldValue, Func<string, IEnumerable<ReplaceItem>> newValues);
+    void ReplaceItem(string oldValue, Func<string, ReplaceItem[]> newValues);
+
+    void ReplaceToTable(string oldValue, Action<string, ITable> buildTable);
+    void ReplaceToTable(string oldValue, FontProps baseFont, Action<string, ITable> buildTable);
+    void ReplaceToText(string oldValue, Action<string, IText> buildText);
+
+
+
+
     void Save();
     void SaveTo(string path);
     Task SaveToAsync(string path, CancellationToken cancellationToken = default);
diff --git a/QWERTYkez.WordProcessor/globals.cs b/QWERTYkez.WordProcessor/globals.cs
index f5f56eb..16c8030 100644
--- a/QWERTYkez.WordProcessor/globals.cs
+++ b/QWERTYkez.WordProcessor/globals.cs
@@ -8,4 +8,5 @@ global using System.IO;
 global using System.Linq;
 global using System.Text;
 global using System.Threading;
-global using System.Threading.Tasks;
\ No newline at end of file
+global using System.Threading.Tasks;
+global using System.Text.RegularExpressions;
\ No newline at end of file