Reverse the vector
Length of a short side
Deleting an element in a matrix
Finding perimeter of a rectangle
Height of a right-angled triangle
Doubling elements in a vector (★★)
Sum of terms in a series 2 (★★★)
Magnitude of a vector (★★★)
Create a vector of n alternating ones and minus ones (★★)
Create times-tables (★★★)
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