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ezrastonMay 5, 2018

The unstated observation made in Unwanted Expansion is that if every variable is equal to 2, then every operation in the expression must increase the total by at least 2 (note that only addition and multiplication are allowed, not subtraction or division). In other words, an expression with n terms or factors will always evaluate to at least 2n. This puts an upper bound on how far any finite-valued expression can be expanded.
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