puts "This post was brought to you by the number #{ x + 75 / y} and th
+e letter #{q}";
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Arbitrary code execution, variables, anything.

If you want printf, Perl has a nicer printf than the example Python syntax. Why? It looks like printf and is therefore nice and short :)

Regardless, a language is not about keystrokes, it's about style. Python is too wordy for me, and not automagical enough.