Find the numeric mean of the prime numbers in a matrix.
Multiply a column by a row
Getting the absolute index from a matrix
Return the first and last character of a string
05 - Vector Equations 3
Back to basics 23 - Triangular matrix
Back to basics 1 - Saving
Back to basics 14 - Keywords
Back to basics 19 - character types
Back to basics 13 - Input variables
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