Easy
6
+12
HALVE
−2
×6
−18
÷8
+11
÷2
+8
Medium
17
DOUBLE
+1
×2/7
SQUARE
÷4
+7
÷8
+2
×1/3
Hard
78
HALVE
+1
×2/5
+12
÷14
SQUARE
CUBE
−5
×2
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).