make all the elements in given x zero.
Simple but fun
I'm not sure this would work if there is a 0 in x...
Will there be a new leader?
find the surface area of a cube
UICBioE240 problem 1.2
Where is the number that you want to find?
Replace all odd numbers with NaN
Make an identity matrix whose diagonal elements are 1:n
true or false
find the 'M'
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