Given vector x, calculate the alternating sum
y = x(1) - x(2) + x(3) - x(4) + ...
Remove all the words that end with "ain"
Make one big string out of two smaller strings
Calculate the area of a triangle between three points
Find the index of the largest value in any vector X=[4,3,4,5,9,12,0,4.....5]
Mean ignoring NaNs
Leap years on other planets
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