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For each of the following questions, determine whether the given formulas is a wff or not. If it is a wff, indicate its main operator.
-P ⊃ (Q ⊃ R) ⊃ [(P • ∼R) ⊃ ∼Q]
Net Exports
The value of a country's total exports minus its total imports, representing the contribution of the trade balance to the overall GDP.
GDP
Gross Domestic Product, the total value of all goods and services produced over a specific time period within a country.
Government Purchases
Expenditures made by the government sector, including spending on goods and services by local, state, and federal governments.
Consumption
The purchase and use of goods and services by households.
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