Easy
16
−3
×4
+18
HALVE
−8
÷9
+6
SQUARE
−1
Medium
16
×5
−17
×1/3
−5
×5/8
SQUARE
+2
÷6
−11
Hard
106
+2
×2/3
−2
÷14
SQUARE
−4
÷7
CUBE
−15
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).