Easy
10
−3
SQUARE
−10
÷3
−1
÷4
+12
×6
+1
Medium
44
×3
×1/6
−3
DOUBLE
−6
÷8
+2
×1/3
SQUARE
Hard
36
+4
÷10
×31/2
SQUARE
×25%
√
−1
×8
+27
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).