idnr: 2857
7+
5/
11+
3-
1-
9+
14+
2/
6+
4+
Difficulty: Medium ()
idnr: 491
30*
12*
10+
1-
9+
400*
2-
12*
Difficulty: Difficult ()
idnr: 2973
30*
20*
12*
30*
72*
40*
40*
Difficulty: Medium ()
idnr: 3137
12+
12*
15*
2*
9+
19+
1
4
3*
3-
Difficulty: Easy ()