Get the length of a given vector
Create matrix of replicated elements
Speed of car
Prime number check (★★)
Create a vector of the first n natural numbers (★)
Generate n equally spaced "intervals" between -x and x (★)
Create a vector of n alternating ones and minus ones (★★)
Create logarithmically spaced values (★)
Sum of terms in a series 1 (★★★)
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