idnr: 2461
8+
12*
60*
7+
3+
40*
4*
17+
3
Difficulty: Medium ()
idnr: 571
9+
7+
5+
2/
12*
7+
4+
5+
30*
4*
10+
Difficulty: Easy ()
idnr: 3696
3-
5+
12+
2/
1-
8+
11+
40*
5/
Difficulty: Difficult ()
idnr: 2009
160*
8+
2/
17+
600*
1
5/
2-
Difficulty: Medium ()