Return the first and last character of a string
Generate a NaN...on purpose
Replace values under a limit
BASICS - sum part of vector
Write a code that will follow the equation y = x * (x + x) * x.
Given the variable x as your input, multiply it by four, then divide it by two. Then put the result in y.
If you have matrix A, create matrix B using matrix A as an "element"
Corresponding letter to ASCII code.
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