diff --git a/src/java/org/apache/poi/hssf/record/formula/AddPtg.java b/src/java/org/apache/poi/hssf/record/formula/AddPtg.java
index 39f938984..eea8cb200 100644
--- a/src/java/org/apache/poi/hssf/record/formula/AddPtg.java
+++ b/src/java/org/apache/poi/hssf/record/formula/AddPtg.java
@@ -154,12 +154,5 @@ public class AddPtg
         buffer.append(operands[ 1 ]);
         return buffer.toString();
     }
-    
-
-    
-    public void manipulate(List source, List results, int pos) {
-        standardBinaryManipulation(source,results,pos);
-        
-    }
-    
+           
 }
diff --git a/src/java/org/apache/poi/hssf/record/formula/DividePtg.java b/src/java/org/apache/poi/hssf/record/formula/DividePtg.java
index 0a2b699e2..d910092c6 100644
--- a/src/java/org/apache/poi/hssf/record/formula/DividePtg.java
+++ b/src/java/org/apache/poi/hssf/record/formula/DividePtg.java
@@ -131,10 +131,5 @@ public class DividePtg
         buffer.append("/");
         buffer.append(operands[ 1 ]);
         return buffer.toString();
-    }
-    
-
-    public void manipulate(List source, List results, int pos) {
-    }
-    
+    }      
 }
diff --git a/src/java/org/apache/poi/hssf/record/formula/MultiplyPtg.java b/src/java/org/apache/poi/hssf/record/formula/MultiplyPtg.java
index f25ecfb78..987eda2d9 100644
--- a/src/java/org/apache/poi/hssf/record/formula/MultiplyPtg.java
+++ b/src/java/org/apache/poi/hssf/record/formula/MultiplyPtg.java
@@ -141,11 +141,7 @@ public class MultiplyPtg
         return buffer.toString();
     }
     
-    
-    public void manipulate(List source, List results, int pos) {
-        standardBinaryManipulation(source, results, pos);
-    }
-        
+            
     public static boolean isNextStringToken(String formula, int pos) {
         boolean retval = false;
         while (pos < formula.length() && Character.isWhitespace(formula.charAt(pos))) {
diff --git a/src/java/org/apache/poi/hssf/record/formula/OperationPtg.java b/src/java/org/apache/poi/hssf/record/formula/OperationPtg.java
index 13669c93c..294d5d10f 100644
--- a/src/java/org/apache/poi/hssf/record/formula/OperationPtg.java
+++ b/src/java/org/apache/poi/hssf/record/formula/OperationPtg.java
@@ -79,14 +79,7 @@ public abstract class OperationPtg extends Ptg
     
     public abstract int getNumberOfOperands();
     
-    /**
-     * manipulate the list, moving the arguments for this function to the source list
-     * followed by the operator.
-     */
-    public abstract void manipulate(List source, List results, int pos);
 
     public abstract String toFormulaString(Ptg [] operands);
     
-    protected void standardBinaryManipulation(List source,List results, int pos) {
-    }
 }
diff --git a/src/java/org/apache/poi/hssf/record/formula/PowerPtg.java b/src/java/org/apache/poi/hssf/record/formula/PowerPtg.java
index 32f5954b3..99660175f 100644
--- a/src/java/org/apache/poi/hssf/record/formula/PowerPtg.java
+++ b/src/java/org/apache/poi/hssf/record/formula/PowerPtg.java
@@ -130,12 +130,6 @@ public class PowerPtg
         buffer.append("^");
         buffer.append(operands[ 1 ]);
         return buffer.toString();
-    }
-    
-
-    
-    public void manipulate(List source, List results, int pos) {
-    }
-    
+    }       
 
 }
diff --git a/src/java/org/apache/poi/hssf/record/formula/SubtractPtg.java b/src/java/org/apache/poi/hssf/record/formula/SubtractPtg.java
index 8fa730066..0053da25e 100644
--- a/src/java/org/apache/poi/hssf/record/formula/SubtractPtg.java
+++ b/src/java/org/apache/poi/hssf/record/formula/SubtractPtg.java
@@ -133,10 +133,4 @@ public class SubtractPtg
         buffer.append(operands[ 1 ]);
         return buffer.toString();
     }
-    
-   
-    public void manipulate(List source, List results, int pos) {
-    }
-    
-
 }