Try out this test problem first.
Given the variable x as your input, square it by two and put the result in y.
Input x = 2
Output y is 4
Input x = 10
Output y is 100
Omit columns averages from a matrix
Back to basics 4 - Search Path
Back to basics 25 - Valid variable names
Flag largest magnitude swings as they occur
03 - Matrix Variables 5
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