yacas

Yet Another Computer Algebra System. More information: http://www.yacas.org.

• Start an interactive yacas session:
  yacas
• While in a yacas session, execute a statement:
  {{Integrate(x)Cos(x)}};
• While in a yacas session, display an example:
  {{Example()}};
• Quit from a yacas session:
  {{quit}}
• Execute one or more yacas scripts (without terminal or prompts), then exit:
  yacas -p -c {{path/to/script1}} {{path/to/script2}}
• Execute and print the result of one statement, then exit:
  echo "{{Echo( Deriv(x)Cos(1/x) );}}" | yacas -p -c /dev/stdin