All odd numbers in x are added, while all even numers are subtracted from this.
x = [1 2 3 4 5];
y = +(1+3+5)-(2+4) = 3
Finding Perfect Squares
Check if number exists in vector
Generate a NaN...on purpose
02 - Vector Variables 2
Odd times even numbers in a matrix
Add the positive numbers
Remove multiples of N
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