The image link is broken. Without it, I have no idea what the problem is asking for or testing.
Sofiya Onyshkevych: it is recommended that at least four test cases be provided in each Test Suite, although more are often necessary to prevent hard-coded workarounds.
David Verrelli: thank you for your remark. fixed it.
goc3: thank you. fixed it.
Sum of diagonal of a square matrix
Return the first and last character of a string
Celsius to Fahrenheit converter
Create incrementing array
Divide by 4
Solve the following boundary value problem
Return the amount of palindromes (words) in the string.
Find the sum of the negative elements under the main diagonal.
Find matrix of indices for multidimensional matrix.
Calculate the eigenvalues of A.
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