8+	18+			6/		42*
		90*	504*	3-	12+
2	19+
4*						10+
		2-		31+
42*		14*
		3+

Difficulty: Impossible ()

1-	11+	16+		14+
					15+
6+			25+		18+
17+						3+
1-	1-		8+
				12+		1-
13+

Difficulty: Impossible ()

42*	2	4320*			14*	30*
	42*
		30*	84*
120*				35*		24*
	280*		5*
				72*	504*

Difficulty: Medium ()

5/	126*	12+			17+
		8*	2/	7*
					19+
10*			2/	9+
14+	10+				3/	25+
	13+	35*

Difficulty: Medium ()