Do rounding towards plus infinity.
Example: -8.8, answer -8
+8.1 answer 9
+8.50 answer 9
Remove the two elements next to NaN value
Reverse a matrix
Get all prime factors
Convert from Fahrenheit to Celsius
Find out of matrix transpose Complex conjugate
Find Out sum of principal diagonal element of given matrix
Convert decimal to hex as shown in test cases
Find out Harmonic mean.
Change the first and last diagonal element of the identity matrix to zero
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