diff --git a/ÜB-Praxis-Abstiegsparser für X-Leer/bin/de/dhbw/compiler/xparser/XParser.class b/ÜB-Praxis-Abstiegsparser für X-Leer/bin/de/dhbw/compiler/xparser/XParser.class
index 4ef849b..a6f0be5 100644
Binary files a/ÜB-Praxis-Abstiegsparser für X-Leer/bin/de/dhbw/compiler/xparser/XParser.class and b/ÜB-Praxis-Abstiegsparser für X-Leer/bin/de/dhbw/compiler/xparser/XParser.class differ
diff --git a/ÜB-Praxis-Abstiegsparser für X-Leer/src/de/dhbw/compiler/xparser/XParser.java b/ÜB-Praxis-Abstiegsparser für X-Leer/src/de/dhbw/compiler/xparser/XParser.java
index 6761f87..c97db4b 100644
--- a/ÜB-Praxis-Abstiegsparser für X-Leer/src/de/dhbw/compiler/xparser/XParser.java	
+++ b/ÜB-Praxis-Abstiegsparser für X-Leer/src/de/dhbw/compiler/xparser/XParser.java	
@@ -138,7 +138,7 @@ public class XParser {
 
 		if ((id = parseToken(Token.ID)) != null
 			&& (assign = parseToken(Token.ASSIGN)) != null
-			&& (numExpr = parseNumExpr0()) != null) {
+			&& (numExpr = parseNumExpr()) != null) {
 			tree.addLastChild(id);
 			tree.addLastChild(assign);
 			tree.addLastChild(numExpr);
@@ -149,75 +149,60 @@ public class XParser {
 		return null;
 	}
 
-	private Tree parseNumExpr0() {
+	private Tree parseNumExpr() {
 		int oldPosition = in.getPosition();
 		Tree tree = new Tree(new Token(Token.EXPR));
-		Tree intConst, a, operator, b;
-
-		if ((intConst = parseNumExpr2()) != null) {
-			tree.addLastChild(intConst);
-			return tree;
-		}
-		in.setPosition(oldPosition);
+		Tree a, b, operator;
 
 		if (((a = parseNumExpr2()) != null)
-				&& ((operator = parseToken(Token.MULT)) != null
-				|| ((operator = parseToken(Token.DIV)) != null
-				|| ((operator = parseToken(Token.PLUS)) != null
-				|| ((operator = parseToken(Token.MINUS)) != null))))
-			&& ((b = parseNumExpr()) != null)) {
+				&& (((operator = parseToken(Token.PLUS)) != null
+				|| (operator = parseToken(Token.MINUS)) != null))
+				&& (b = parseNumExpr()) != null) {
 			tree.addLastChild(a);
 			tree.addLastChild(operator);
 			tree.addLastChild(b);
 			return tree;
 		}
-
 		in.setPosition(oldPosition);
-		return null;
-	}
 
-	private Tree parseNumExpr() {
-		int oldPosition = in.getPosition();
-		Tree tree = new Tree(new Token(Token.EXPR));
-		Tree id, intConst;
-
-		if ((intConst = parseNumExpr2()) != null) {
-			tree.addLastChild(intConst);
+		if ((a = parseNumExpr2()) != null) {
+			tree.addLastChild(a);
 			return tree;
 		}
-
-		if ((id = parseToken(Token.ID)) != null) {
-			tree.addLastChild(id);
-			return tree;
-		}
-
 		in.setPosition(oldPosition);
+
 		return null;
 	}
 
 	private Tree parseNumExpr2() {
 		int oldPosition = in.getPosition();
 		Tree tree = new Tree(new Token(Token.EXPR2));
-		Tree id, intConst;
+		Tree a, b, operator;
 
-		if ((intConst = parseNumExpr3()) != null) {
-			tree.addLastChild(intConst);
+		if (((a = parseNumExpr3()) != null)
+			&& (((operator = parseToken(Token.MULT)) != null
+				  || (operator = parseToken(Token.DIV)) != null))
+			&& (b = parseNumExpr2()) != null) {
+			tree.addLastChild(a);
+			tree.addLastChild(operator);
+			tree.addLastChild(b);
 			return tree;
 		}
 		in.setPosition(oldPosition);
 
-		if ((id = parseToken(Token.ID)) != null) {
-			tree.addLastChild(id);
+		if ((a = parseNumExpr3()) != null) {
+			tree.addLastChild(a);
 			return tree;
 		}
 		in.setPosition(oldPosition);
+
 		return null;
 	}
 
 	private Tree parseNumExpr3() {
 		int oldPosition = in.getPosition();
 		Tree tree = new Tree(new Token(Token.EXPR3));
-		Tree id, intConst;
+		Tree sign, intConst, id, num, lbr, rbr;
 
 		if ((intConst = parseToken(Token.INTCONST)) != null) {
 			tree.addLastChild(intConst);
@@ -225,6 +210,14 @@ public class XParser {
 		}
 		in.setPosition(oldPosition);
 
+		if (((sign = parseToken(Token.MINUS)) != null
+			&& ((intConst = parseToken(Token.INTCONST))) != null)) {
+			tree.addLastChild(sign);
+			tree.addLastChild(intConst);
+			return tree;
+		}
+		in.setPosition(oldPosition);
+
 		if ((id = parseToken(Token.ID)) != null) {
 			tree.addLastChild(id);
 			return tree;