Find vecor x.
Make a random, non-repeating vector.
Generate a NaN...on purpose
Reverse a matrix
Change the first and last diagonal element of the identity matrix to zero
Element by element multiplication of two vectors
Calculate the centroid of a triangle
Solve the following system of equations.
Create cotangent function out of sine.
Numerate input arguments
Find the product of the positive elements above the main diagonal.
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