First test case is invalid. Please fix it.
I have fixed it.
and the fourth...
It must be OK now!
Remove the polynomials that have positive real elements of their roots.
Determine if a Given Number is a Triangle Number
Test if a Number is a Palindrome without using any String Operations
Convert a numerical matrix into a cell array of strings
Calculate trends in time series
Your favourite city!
Bridge and Torch Problem - Probability
Repeat string n times - 3
Cryptography with A Square Matrix : Decoding
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