diff --git a/core/src/main/java/it/cavallium/warppi/math/rules/RulesManager.java b/core/src/main/java/it/cavallium/warppi/math/rules/RulesManager.java
index 2924eda0..8d872b13 100644
--- a/core/src/main/java/it/cavallium/warppi/math/rules/RulesManager.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/RulesManager.java
@@ -10,6 +10,7 @@ import java.net.URISyntaxException;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Stream;
 
 import it.cavallium.warppi.Engine;
 import it.cavallium.warppi.Platform.ConsoleUtils;
@@ -23,6 +24,7 @@ import it.cavallium.warppi.math.functions.Variable;
 import it.cavallium.warppi.math.functions.Variable.V_TYPE;
 import it.cavallium.warppi.math.rules.dsl.DslAggregateException;
 import it.cavallium.warppi.math.rules.dsl.RulesDsl;
+import it.cavallium.warppi.math.rules.functions.*;
 import it.cavallium.warppi.math.solver.MathSolver;
 import it.cavallium.warppi.util.Error;
 import it.unimi.dsi.fastutil.objects.ObjectArrayList;
@@ -41,6 +43,8 @@ public class RulesManager {
 			RulesManager.rules[val.ordinal()] = new ObjectArrayList<>();
 		}
 
+		loadBuiltinRules();
+
 		try {
 			loadDslRules();
 
@@ -159,6 +163,24 @@ public class RulesManager {
 		}
 	}
 
+	private static void loadBuiltinRules() {
+		Stream.of(
+				new DivisionRule(),
+				new EmptyNumberRule(),
+				new ExpressionRule(),
+				new JokeRule(),
+				new MultiplicationRule(),
+				new NegativeRule(),
+				new NumberRule(),
+				new PowerRule(),
+				new RootRule(),
+				new SubtractionRule(),
+				new SumRule(),
+				new SumSubtractionRule(),
+				new VariableRule()
+		).forEach(RulesManager::addRule);
+	}
+
 	private static void loadDslRules() throws IOException, DslAggregateException {
 		final StorageUtils storageUtils = Engine.getPlatform().getStorageUtils();
 
diff --git a/rules/src/main/java/rules/functions/DivisionRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/DivisionRule.java
similarity index 95%
rename from rules/src/main/java/rules/functions/DivisionRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/DivisionRule.java
index c1935f06..71d97bb2 100644
--- a/rules/src/main/java/rules/functions/DivisionRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/DivisionRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.DivisionRule
diff --git a/rules/src/main/java/rules/functions/EmptyNumberRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/EmptyNumberRule.java
similarity index 89%
rename from rules/src/main/java/rules/functions/EmptyNumberRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/EmptyNumberRule.java
index 02be7d93..8aeb4f1e 100644
--- a/rules/src/main/java/rules/functions/EmptyNumberRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/EmptyNumberRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.EmptyNumberRule
diff --git a/rules/src/main/java/rules/functions/ExpressionRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/ExpressionRule.java
similarity index 91%
rename from rules/src/main/java/rules/functions/ExpressionRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/ExpressionRule.java
index 4edab81a..1d444bc4 100644
--- a/rules/src/main/java/rules/functions/ExpressionRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/ExpressionRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.ExpressionRule
diff --git a/rules/src/main/java/rules/functions/JokeRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/JokeRule.java
similarity index 89%
rename from rules/src/main/java/rules/functions/JokeRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/JokeRule.java
index 6c3592c0..c05e9997 100644
--- a/rules/src/main/java/rules/functions/JokeRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/JokeRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.JokeRule
diff --git a/rules/src/main/java/rules/functions/MultiplicationRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/MultiplicationRule.java
similarity index 92%
rename from rules/src/main/java/rules/functions/MultiplicationRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/MultiplicationRule.java
index 631b14e4..061ffd74 100644
--- a/rules/src/main/java/rules/functions/MultiplicationRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/MultiplicationRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.MultiplicationRule
diff --git a/rules/src/main/java/rules/functions/NegativeRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/NegativeRule.java
similarity index 93%
rename from rules/src/main/java/rules/functions/NegativeRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/NegativeRule.java
index 8bdc9e5c..c4c09891 100644
--- a/rules/src/main/java/rules/functions/NegativeRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/NegativeRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.NegativeRule
diff --git a/rules/src/main/java/rules/functions/NumberRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/NumberRule.java
similarity index 93%
rename from rules/src/main/java/rules/functions/NumberRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/NumberRule.java
index bd106b45..39f7fd2a 100644
--- a/rules/src/main/java/rules/functions/NumberRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/NumberRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.NumberRule
diff --git a/rules/src/main/java/rules/functions/PowerRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/PowerRule.java
similarity index 93%
rename from rules/src/main/java/rules/functions/PowerRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/PowerRule.java
index 46cec6c4..d7fec53a 100644
--- a/rules/src/main/java/rules/functions/PowerRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/PowerRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.PowerRule
diff --git a/rules/src/main/java/rules/functions/RootRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/RootRule.java
similarity index 95%
rename from rules/src/main/java/rules/functions/RootRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/RootRule.java
index a824828f..5a9bad89 100644
--- a/rules/src/main/java/rules/functions/RootRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/RootRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.RootRule
diff --git a/rules/src/main/java/rules/functions/SubtractionRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/SubtractionRule.java
similarity index 93%
rename from rules/src/main/java/rules/functions/SubtractionRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/SubtractionRule.java
index 3ccb3bdb..7f1b17f8 100644
--- a/rules/src/main/java/rules/functions/SubtractionRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/SubtractionRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.SubtractionRule
diff --git a/rules/src/main/java/rules/functions/SumRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/SumRule.java
similarity index 92%
rename from rules/src/main/java/rules/functions/SumRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/SumRule.java
index ebe2d7a3..404d0375 100644
--- a/rules/src/main/java/rules/functions/SumRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/SumRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.SumRule
diff --git a/rules/src/main/java/rules/functions/SumSubtractionRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/SumSubtractionRule.java
similarity index 93%
rename from rules/src/main/java/rules/functions/SumSubtractionRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/SumSubtractionRule.java
index ac1ea246..44772d74 100644
--- a/rules/src/main/java/rules/functions/SumSubtractionRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/SumSubtractionRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.SumSubtractionRule
diff --git a/rules/src/main/java/rules/functions/VariableRule.java b/core/src/main/java/it/cavallium/warppi/math/rules/functions/VariableRule.java
similarity index 93%
rename from rules/src/main/java/rules/functions/VariableRule.java
rename to core/src/main/java/it/cavallium/warppi/math/rules/functions/VariableRule.java
index 3823f125..89fb657b 100644
--- a/rules/src/main/java/rules/functions/VariableRule.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/functions/VariableRule.java
@@ -1,4 +1,4 @@
-package rules.functions;
+package it.cavallium.warppi.math.rules.functions;
 /*
 SETTINGS: (please don't move this part)
  PATH=functions.VariableRule
diff --git a/core/src/main/resources/default-rules.lst b/core/src/main/resources/default-rules.lst
index 8a34c9c4..5fb51e4d 100644
--- a/core/src/main/resources/default-rules.lst
+++ b/core/src/main/resources/default-rules.lst
@@ -1,15 +1,2 @@
-functions/DivisionRule
-functions/EmptyNumberRule
-functions/ExpressionRule
-functions/JokeRule
-functions/MultiplicationRule
-functions/NegativeRule
-functions/NumberRule
-functions/PowerRule
-functions/RootRule
-functions/SubtractionRule
-functions/SumRule
-functions/SumSubtractionRule
-functions/VariableRule
 ExpandRule1
 ExponentRule17
\ No newline at end of file