Count the number of occurrences of the second input in the first input
x1 = 12344455511; x2 =2; output = 1
x1 = 12344455511; x2 =1; output = 3
Return a list sorted by number of occurrences
Back to basics 1 - Saving
Replicate elements in vectors
Determine the mean of matrix
Find the area of a triangle
Create tangent function out of sin and cos
Create Truth Table of Size according to input
Create sine function out of cosine
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