diff --git a/src/main/java/models/terms/DependencyTerm.java b/src/main/java/models/terms/DependencyTerm.java
index 201d109..981bd56 100644
--- a/src/main/java/models/terms/DependencyTerm.java
+++ b/src/main/java/models/terms/DependencyTerm.java
@@ -4,6 +4,7 @@
 import java.util.Arrays;
 import java.util.List;
 import java.util.TreeMap;
+import java.util.stream.IntStream;
 
 import exceptions.SyntaxException;
 import lombok.Getter;
@@ -26,17 +27,13 @@
 			throw new SyntaxException("Args size must be odd.");
 		}
 		this.size = dependingTerm.getSize();
-		boolean argOrderType = terms.get(0).getOrder() <= terms.get(1).getOrder();
+		int maxArgOrder = IntStream.range(0, terms.size()).filter(i -> i % 2 == 1).map(i -> terms.get(i).getOrder()).max().orElse(0);
+		int maxDependedOrder = IntStream.range(0, terms.size()).filter(i -> i % 2 == 0).map(i -> terms.get(i).getOrder()).max().orElse(0);
+		boolean argOrderType = maxDependedOrder <= maxArgOrder;
 		if (argOrderType) {
-			this.order = terms.get(1).getOrder();
-			if (dependingTerm.getOrder() > getOrder()) {
-				throw new SyntaxException("order invalid");
-			}
+			this.order = maxArgOrder;
 		} else {
-			this.order = terms.get(0).getOrder() - 1;
-			if (dependingTerm.getOrder() > terms.get(0).getOrder()) {
-				throw new SyntaxException("order invalid");
-			}
+			this.order = maxDependedOrder - 1;
 		}
 		this.dependingTerm = dependingTerm;
 		this.termPairs = new TreeMap<>();
@@ -47,21 +44,6 @@
 			termPairs.put(dependedTerm, argTerm);
 			this.size += dependedTerm.getSize();
 			this.size += argTerm.getSize();
-			if (argOrderType) {
-				if (argTerm.getOrder() != getOrder()) {
-					throw new SyntaxException("order not same");
-				}
-				if (dependedTerm.getOrder() > getOrder()) {
-					throw new SyntaxException("order invalid");
-				}
-			} else {
-				if (dependedTerm.getOrder() - 1 != getOrder()) {
-					throw new SyntaxException("order not same");
-				}
-				if (argTerm.getOrder() > getOrder()) {
-					throw new SyntaxException("order invalid");
-				}
-			}
 		}
 		for (EvaluatableTerm dependedTerm : termPairs.keySet()) {
 			addChild(dependedTerm);