07 - Common functions and indexing 5
Length of the hypotenuse
Write a code that will follow the equation y = x * (x + x) * x.
Draw a 'X'!
Swap the first and last columns (★★)
Extract leading non-zero digit (★★★★★)
Get the elements of diagonal and antidiagonal for any m-by-n matrix (★★★★)
Average of corner elements of a matrix (★★)
Sum of terms in a series 1 (★★★)
Variance computation (★)
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