diff --git a/src/Main.java b/src/Main.java
index a5f0b3b..4eac28d 100644
--- a/src/Main.java
+++ b/src/Main.java
@@ -3,9 +3,11 @@
 public class Main {
 	private static ISubscriber subscribers [] = {
 
-			new SphereArea(), new LucasSeries(),
+			new SphereArea(), new LucasSeries() , new SphereCircumference() , new summationSeries(),	
+      new SphereArea(), new LucasSeries(),
 			new Spherevolume()
 
+
 	};
 	public static void main(String[] args) {
 		Topic mathTopic = new Topic();