Sums with Excluded Digits
select the primes of a vector
2倍してみよう - ここからスタート！
Matlab Basics - y as a function of x
Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock. Tick. Tock.
Find the alphabetic word product
Test for balanced parentheses
Summing Digits within Text
Get the area codes from a list of phone numbers
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