May you add some testcases concerning that ~mod(63-45,9) = true, but 63 and 45 has definitely not the same digits.
Sum all integers from 1 to 2^n
Find nearest prime number less than input number
Doubling elements in a vector
Deleting an element in a matrix
Replacing a row
Determine if a Given Number is a Triangle Number
Parse me a Lisp
Make a 1 hot vector
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