Easy
4
×6
−18
×3
+17
÷7
+13
÷2
SQUARE
+19
Medium
27
−1
×1/2
−3
DOUBLE
+7
×7/9
−9
SQUARE
−16
Hard
119
+1
÷4
+2
×31/2
+8
÷10
+3
×42/5
HALVE
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