Easy
10
+9
×5
−18
÷7
−2
SQUARE
+11
÷4
−5
Medium
18
+3
×3/7
×6
+2
×3/4
×2
−12
HALVE
−19
Hard
92
−4
×5/8
+45
×11/4
+7
÷12
−2
SQUARE
×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).