Note that this problem uses the word solve when it needs to say EVALUATE.
Also the required code to pass the tests shouldn't be available by COPY-AND-PASTE from Test Suite!
Remove NaN ?
Return area of square
Find out total non zero element of matrix
Vectors counting by 2
Find hen's weight.
Opposite task convert string hexadecimal numbers array into array of decimal numbers .
Find Euclidean norm of given vector u.
Multiply two polynomials p and q given in in vector representation.
Sum positive elements of matrix.
Find cosine between two given vectors u and v.
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