Find vecor x.
Given a window, how many subsets of a vector sum positive
Duplicate a character
Matlab Basics II - Free Fall
Divisible by 2
Create cotangent function out of sine.
Check if a string starts with another string
Return the amount of palindromes (words) in the string.
Find the sum of the negative elements under the main diagonal.
Return ! if array element starts with a certain letter. Otherwise return ?
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