Easy
9
×2
−5
×3
−19
HALVE
−2
÷4
+1
SQUARE
Medium
29
−2
÷3
+1
×1/2
SQUARE
×5
+3
×3/4
×2
Hard
71
+1
÷9
×25%
SQUARE
+32
HALVE
+3
÷7
CUBE
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).