Add only the even numbers of x
x = [1 2 3 4 5]
the positive numbers are: 2 4, so their sum is 6
Find all elements less than 0 or greater than 10 and replace them with NaN
Tell me the slope
Product of elements in row
sum of ASCII
Connect 4 (the boardgame)
Odd times 3
i forgot to use capital I
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