Make fMat be a 5x3 matrix of random integers with values from -3 to 3
(Hint: use randi)
Test for randomness could be tightened (cf. Solution 1490988).
Sum of diagonal of a square matrix
Make a random, non-repeating vector.
Maximum value in a matrix
05 - Vector Equations 3
04 - Scalar Equations 3
05 - Vector Equations 2
02 - Vector Variables 3
06 - Matrix Equations 1
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