Easy
7
+5
×2
+8
÷4
−1
SQUARE
−19
÷3
+14
Medium
58
HALVE
+3
×1/4
−1
SQUARE
×3
−17
DOUBLE
−13
Hard
121
√
+4
×12/5
+1
×21/2
−6
÷7
CUBE
−15
There are two versions that can be printed, a default one, and one that requires less ink (no objectives or rules, and no lines).