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# Computer algebra systems

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**Computer algebra systems** are computer programs that not only perform numeric computations but are also capable of symbolic computations. They can be given inputs like and respond with alternate forms like or , find the root (in this example, ), compute derivatives, indefinite integrals, global minimums, series representations, differential geometric curves, etc. And of course they can also handle explicit inputs like .

The most commonly-used computer algebra systems on the OEIS are Maple, Mathematica, and PARI/GP. Other systems used are Magma and Sage.