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Useful tools:
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A function plotter
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Enter a function -- obtain a plot of the function and of its first derivative. In addition, the first derivative is calculated and printed on the screen
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Another function plotter
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Enter a function -- obtain a plot of the function. This is a bit less advanced; the function input is less than perfect
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Calculate derivatives
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Enter a function -- obtain its first, second, third... derivatives
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Calculate definite integrals
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Enter a function and the lower and upper limit -- obtain a numerical value for
the definite integral of that function in the given interval
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