diff --git a/core/src/main/java/it/cavallium/warppi/math/rules/dsl/PatternUtils.java b/core/src/main/java/it/cavallium/warppi/math/rules/dsl/PatternUtils.java
index f74cade9..466bb760 100644
--- a/core/src/main/java/it/cavallium/warppi/math/rules/dsl/PatternUtils.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/dsl/PatternUtils.java
@@ -2,7 +2,6 @@ package it.cavallium.warppi.math.rules.dsl;
 
 import it.cavallium.warppi.math.Function;
 import it.cavallium.warppi.math.FunctionOperator;
-import it.cavallium.warppi.math.functions.Subtraction;
 import it.cavallium.warppi.math.rules.dsl.patterns.SubFunctionPattern;
 
 import java.util.*;
diff --git a/core/src/main/java/it/cavallium/warppi/math/rules/dsl/patterns/EquationPattern.java b/core/src/main/java/it/cavallium/warppi/math/rules/dsl/patterns/EquationPattern.java
index b11d88cc..5be8413e 100644
--- a/core/src/main/java/it/cavallium/warppi/math/rules/dsl/patterns/EquationPattern.java
+++ b/core/src/main/java/it/cavallium/warppi/math/rules/dsl/patterns/EquationPattern.java
@@ -2,7 +2,6 @@ package it.cavallium.warppi.math.rules.dsl.patterns;
 
 import it.cavallium.warppi.math.Function;
 import it.cavallium.warppi.math.MathContext;
-import it.cavallium.warppi.math.functions.Sum;
 import it.cavallium.warppi.math.functions.equations.Equation;
 import it.cavallium.warppi.math.rules.dsl.Pattern;
 import it.cavallium.warppi.math.rules.dsl.PatternUtils;
diff --git a/core/src/test/java/it/cavallium/warppi/math/rules/dsl/PatternRuleTest.java b/core/src/test/java/it/cavallium/warppi/math/rules/dsl/PatternRuleTest.java
index 44832254..9e67ded8 100644
--- a/core/src/test/java/it/cavallium/warppi/math/rules/dsl/PatternRuleTest.java
+++ b/core/src/test/java/it/cavallium/warppi/math/rules/dsl/PatternRuleTest.java
@@ -9,7 +9,6 @@ import it.cavallium.warppi.math.functions.SumSubtraction;
 import it.cavallium.warppi.math.rules.RuleType;
 import it.cavallium.warppi.math.rules.dsl.patterns.*;
 import it.cavallium.warppi.util.Error;
-import it.cavallium.warppi.util.Errors;
 import it.unimi.dsi.fastutil.objects.ObjectArrayList;
 import org.junit.Test;