Pipe Operator |>

The |> operator passes the result of the left expression as the first argument of the right function:

fn double(x: int) -> int { x * 2 }
fn add_one(x: int) -> int { x + 1 }

// Equivalent to add_one(double(5))
let result = 5 |> double() |> add_one()
print(result) // 11

Goal: Use pipe to calculate: (10 + 5) * 2 - 1 = 29. Implement the functions add_five, double and sub_one.