7+		11+			16+
	5-		4+	3-
9+		10+
11+	6+		11+
				9+
	1-		1-

Difficulty: Difficult ()

6+	18*			18+	120*
	10*
			90*
15+	7+	3-			6+
			9+	1-
	8*

Difficulty: Very Difficult ()

120*	60*	5/		6*	3/
		2/
			6/	2	60*
2/		10*		24*
6*	24*		60*

Difficulty: Easy ()

13+	6+		9+	10+
	12*				90*
		20*		30*
16+			2
			10+	6*
	30*

Difficulty: Impossible ()