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- Vectors and Trigonometry
- Probability and Statistics
- Logarithms and Exponents
- Differential and Integral Calculus
- Algebra and Functions
- Numbers and Geometry

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We have become great because of the lavish use of our resources. But the time has come to inquire seriously what will happen when our forests are gone, when the coal, the iron, the oil and the gas are exhausted, when the soils have still further impoverished and washed into the streams, polluting the rivers, denuding the fields and obstructing navigation.

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