if you're going to post trivial problems that have already been posted before, at least use a proper test suite.
and this one does not even require a solution
Derivative of polynomial
Matlab Basics - Switching Assignments
Matlab Basics II - Count rows in a matrix
Multiply by 3
Create sequnce 1 4 9 16 25.........
Matlab Basics II - Log and natural log
Matlab Basics II - 3 Dimensional Arrays
Matlab Basics - Rounding I
Replace every 3rd element in a vector with 4
Matlab Basics II - Find the roots of a function
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