For a given input string str, find how many spaces are there in the string and replace those spaces with *
e.g. str = 'this is demo of replacing spaces with stars';
out = 'this*is*demo*of*replacing*spaces*with*stars'
Basics: 'Find the eigenvalues of given matrix
03 - Matrix Variables 4
05 - Vector Equations 2
Min of a Matrix
Length of a short side
Matrix multiplication across rows
Given an input string, generate a variable name out of it
Let's get back to school: create mixed numbered fraction
Back to basics - mean of corner elements of a matrix
Sum of diagonals elements of a matrix
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