Set some matrix elements to zero
Is this triangle right-angled?
Sum of diagonals elements of a matrix
modulus of a number
Draw 'O' !
Create a vector of the first n odd numbers (★)
Approximate functions 1 (★★★)
Sum of terms in a series 1 (★★★)
Create a vector of n alternating ones and minus ones (★★)
Mo money, mo math #2! (★★★)
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