In a matrix, A = [1,2;3,4]
raise the power of each element like: 1^1+2^3+3^2+4^4 and add it all to produce the result 274
Select every other element of a vector
Swap two numbers
Deleting an element in a matrix
Conversion from hours to mili sec
Find hen's weight.
Check if there are white spaces in the input string
Find NaNs in the matrix
Perimeter of a semicircle
basic matrix operations: rotate and find sum of diagonal elements of the resultant matrix
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