Return 1s wherever there is a NaN in the input matrix
Create a square matrix of multiples
Simple equation: Annual salary
Add a row of zeros on top of a matrix
Sum of series II
basic matrix operations: rotate and find sum of diagonal elements of the resultant matrix
function to compute root mean square of first nn positive odd integers
Sum of unique multiples of 3 and 5
Raise each element to the power of its index in a matrix
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