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
Doubling elements in a vector
Maximum value in a matrix
Speed of car
Area of a circle
How many complete pizzas
i forgot to use capital I
How many complete pizzas (number 2)
Check capital letters
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