very cool question: learn some new tricks, and get 10 points, why not?!
Hint to spare the pain : string(NaN)==
Remove all the words that end with "ain"
Sum of diagonal of a square matrix
Return 'on' or 'off'
Find the index of n in magic(n)
Cody meets Xiangqi: foresee the unseen (Part 2)
Fast 1-D Convolution (same shape)
Histogram of histogram
Combine the first and last names
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