You gave a hint as well as showed the solution in the test suites only.
The solution has been removed from the test suite.
Check if sorted
MATCH THE STRINGS (2 CHAR) very easy
Back to basics - mean of corner elements of a matrix
Generate vector according to sign of vector
Find the area of a triangle
Calculate inverse matrix in m by n matrix
Weighted moving average
Make roundn function
Change string to number
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