Return x by reshaping it.
+1 for the unintentionally hilarious "non trivial identities" series
Swap the first and last columns
Inner product of two vectors
Find the sum of the elements in the "second" diagonal
Is it a number?
06 - Matrix Equations 1
Area of polygon
Geometrical meaning of determinant
A shooting competition
Non trivial identities - summation
Find the diagonal of the square of side L
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