Easy
8
−1
×3
−12
SQUARE
+1
÷2
+15
HALVE
+11
Medium
18
DOUBLE
×1/4
SQUARE
+3
÷7
+6
÷9
+4
×1/2
Hard
62
−6
÷7
+2
×32/5
+10
×11/2
+6
÷8
SQUARE
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).