Easy
11
+4
÷5
SQUARE
×2
−5
×4
+18
HALVE
−16
Medium
58
+5
×1/9
×6
−14
HALVE
+2
×1/4
DOUBLE
SQUARE
Hard
106
HALVE
−3
×11/5
×25%
SQUARE
+6
×2/7
+4
÷7
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).