Give the sum of the first 'n' terms of a geometric series, given 'a' as the first term and 'r' as the ratio.
Filter AC, pass DC
Magic is simple (for beginners)
Number of digits in an integer
Returning a "greater than" vector
length of a vector
Alternating 1´s and 0´s in a matrix
Ratio between sum of primes and sum of factors
Approximate the inverse tangent by power series
Ratio between sum of primer numbers and non-prime numbers
Say type of roots in quadratic equation
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