Easy
4
+3
×5
+19
HALVE
−3
÷4
−1
SQUARE
−14
Medium
19
×5
+4
×2/3
DOUBLE
+3
÷9
+1
×1/2
×8
Hard
69
+1
×5/7
+6
÷8
CUBE
−1
×2/3
−4
÷14
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).