function-machine/division/expert · Set 39

8 problems
1
? → [-3] → 2 =
2
Input: 6 → [×3] → ? =
3
Input: 9 → [-3] → ? =
4
? → [+5] → 15 =
5
? → [×2 + 1] → 21 =
6
? → [+4 ×2] → 26 =
7
Input: 7 → [?] → 6, what is the rule? =
8
? → [×5] → 50 =
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