diff --git a/w02-calculator/src/main/java/pl/mmatuszak/ift/Calculator.java b/w02-calculator/src/main/java/pl/mmatuszak/ift/Calculator.java
index b681adb..5866b5f 100644
--- a/w02-calculator/src/main/java/pl/mmatuszak/ift/Calculator.java
+++ b/w02-calculator/src/main/java/pl/mmatuszak/ift/Calculator.java
@@ -15,43 +15,8 @@ public int multiply(int x, int y) {
         return x * y;
     }
 
-    public int divide(int x, int y) {
-        throw new UnsupportedOperationException("to do divide");
-    }
-
-    public int neg(int x) {
-        throw new UnsupportedOperationException("to do neg");
-    }
-
-    public int abs(int x) {
-        throw new UnsupportedOperationException("to do abs");
-    }
-
-    public int min(int x, int y) {
-        throw new UnsupportedOperationException("to do min");
-    }
-
-    public int max(int x, int y) {
-        throw new UnsupportedOperationException("to do max");
-    }
 
 
-    public int min(int x, int y, int z) {
-        throw new UnsupportedOperationException("to do min");
-    }
-
-    public int max(int x, int y, int z) {
-        throw new UnsupportedOperationException("to do max");
-    }
-
-    public int min(int x, int y, int z, int t) {
-        throw new UnsupportedOperationException("to do min");
-    }
-
-    public int max(int x, int y, int z, int t) {
-        throw new UnsupportedOperationException("to do max");
-    }
-
 
 
 }