See the test suite of http://www.mathworks.co.uk/matlabcentral/cody/problems/2513 for an example of how to make sure regexp and other functions are not used.
Thanks for the tip, modified the test suite and updated the problem description to include regexpi in the list of illegal functions.
Modified the test suite again, sorry if it affects your solution.
Make an awesome ramp for a tiny motorcycle stuntman
Will there be a new leader?
02 - Vector Variables 5
Fibonacci-Sum of Squares
Reverse a matrix
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