diff --git a/Task_3/Task_3.2/Makefile b/Task_3/Task_3.2/Makefile
index 052a336..449f874 100644
--- a/Task_3/Task_3.2/Makefile
+++ b/Task_3/Task_3.2/Makefile
@@ -17,11 +17,12 @@ all: linux-24.pdf
 	$(BIB) $*
 	$(LATEX) $*
 
-	# Überprüfe auf "undefined references" im Log-File
-	@if grep -q "undefined references" $*.log; then \
+# check if "undefined references" in Log-File 
+# using shell commands
+	if grep -q "undefined references" $*.log; then \
 		$(LATEX) $*; \
 	fi
 
 # remove all created files
 clean:
-	rm -f *.pdf *.aux *.log *.bbl *.blg
\ No newline at end of file
+	rm -f *.pdf *.aux *.log *.bbl *.blg *.fdb_latexmk *.fls *.synctex.gz
\ No newline at end of file