Easy
5
+6
×5
−6
÷7
−1
×3
+14
HALVE
+9
Medium
19
×4
+1
×2/7
HALVE
−2
SQUARE
−10
×2
−7
Hard
46
HALVE
+1
×2/3
SQUARE
×25%
+8
÷9
CUBE
+12
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).