nicely done!first one use ndgrid finish the orginal expansion in this one.
I think it's the first time I see this function in Cody.
Derivative of polynomial
frame of the matrix
Maximum value in a matrix
Replace Nonzero Numbers with 1
S-T-R-E-T-C-H I-T O-U-T
Numbered lottery balls into cells
Reindex a vector
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