Additional test cases have been added.
The title and description/instruction should refer to finding and outputting "means" (plural), not "the mean" (singular). Also, it would have been good for the Test Suite to include both row and column vectors, appropriately paired.
04 - Scalar Equations 2
Evaluating a polynomial
Given the variable x as your input, multiply it by four, then divide it by two. Then put the result in y.
Simple String Concatenation
Matrix Ax=B problem
Sum two matrices
Vector Element Multiplication
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