Exercise 1.1

simple x y z = x * (y + z)
 
simple (simple 2 3 4) 5 6
=> simple (2 * (3 + 4)) 5 6
=> simple (2 * 7) 5 6
=> simple 14 5 6
=> 14 * (5 + 6)
=> 14 * 11
=> 154

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