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I would like to know if there is a command in Matlab or Mathematica or Maple, which shows the area of a closed curve.

For example, find the area enclosed by a circle, x^2+y^2=1.

I wish I could use a command like "SOME_AREA_COMMAND[x^2+y^2=1]" and it can give me the answer Pi.

I know I can use integral, but sometimes it is difficult to find the joint points.

Thank you all. :-)

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# Maple Area command in Matlab or Mathematica or Maple

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