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def f1(x): return x + 1 def f2(x): return x * 2 def f3(x): return x - 3 result = f1(f2(f3(10))) text = ' Hello World ' cleaned = text.strip().lower().replace('hello', 'hi') def make_adder(n): def adder(x): return x + n return adder adder5 = make_adder(5) result2 = adder5(10) result3 = make_adder(2)(8)