Easy
12
−5
SQUARE
−1
÷2
−13
×6
−14
÷4
+17
Medium
13
SQUARE
+7
÷8
−1
×1/3
×4
+8
×2/3
−9
Hard
109
−11
×2/7
×25%
+2
×41/3
+5
÷11
√
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).